The suction cup of the DVR does not hold: what to do to prevent it from falling off

General principles of fastening

It will be possible to securely fix the suction cup if two basic conditions are met:

The surface on which the suction cup will be located must be flat and smooth.
The suction cup itself should not have obvious defects on the inside.

Basic principles of fastening:

Surfaces must be cleaned and degreased. This applies to both the mounting location and the suction cup itself. Dirt, dust, soap and lime stains, rust and other contaminants will not allow the suction cup to attach firmly. As for degreasing, for this purpose you can use detergents, soap solution, and alcohol solution.
It is necessary to glue only a dry suction cup and only on a dry surface.
Under extreme temperature conditions, increased loads on the suction cup, and also if the surface for fastening has a non-uniform texture or unevenness, you should use means to improve the adhesion of surfaces: Vaseline, self-adhesive PVC film, silicone sealant.

Tips for different types of surfaces

Different types of surfaces, for example, tiles, plastic, glass, have some nuances in the process of gluing the suction cup.

Tile

Most often, it is on the tiles in the bathroom that you have to glue a variety of hooks, shelves and holders. In order for the adhesion of the suction cups to the tile surface to be as effective as possible, you should adhere to the following recommendations:

Ventilate the bathroom if it is damp.
Prepare the surface of the tile by washing it thoroughly, for example, using dishwashing detergent or ordinary soapy water. If necessary, additionally use alcohol-based degreasing agents.
Wipe the tiles dry.
Place the suction cup on the tile and press it firmly.

Important! Do not overload shelves and hooks. Try not to pour water on the area of the suction cups, as the weight of the water may cause the suction cups to move or fall off. If you need to glue the suction cups inside the shower stall, use transparent silicone sealant, this fastening will be more reliable.

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Plastic

To properly glue the suction cup to the plastic, you need to pay attention to the surface. If it is smooth and even, then there will be no problems with fastening. © https://ydoo.info/qa/kak-prikleit-prisosku.html The algorithm of actions is simple:

Surface cleaning.
Degreasing.
Suction cup gluing.

If the suction cup needs to be attached to a car dashboard and similar surfaces where there is a “pattern” on the plastic, it is best to use a special suction cup with a lever, which during the fastening process creates a vacuum under the suction cup. Conventional suction cups do not adhere well to textured surfaces; they must be additionally secured with self-adhesive PVC films.

Glass

How to properly attach a suction cup to glass? It is this surface that causes the most problems. Thermometers attached to the window, as well as holders for video recorders on the windshield, very often fall off due to exposure to high temperatures in summer and low temperatures in winter. Attaching suction cups in an aquarium causes no less problems. It is quite possible to securely fix the suction cup if you follow the recommendations below.

Recorder bracket repair

There are often cases when the suction cup itself becomes unusable: the plastic pin holding the “hat” breaks. This happens if you remove the DVR and pull it by the body without being careful.

One way to fix it is to smear the pin with superglue, but the connection will not hold for long, sooner or later the “cap” will fall off. The easiest option is to buy a new mount, but you can still try to restore the suction cup; repairs will cost much less than the purchase. Let's look at how you can repair a suction cup with a lever:

disassemble the bracket - use a Phillips screwdriver to unscrew the screw and remove the cap;
remove the pin;
dismantle the spring and the rod with the broken base;
Using a 3.5 mm drill, we drill a small hole in the body of the rod (in the place where the lower part of the suction cup was attached);
we clean the area, take two wide washers, coat them with glue and place them on the sides of the rubber diaphragm;
take a screw or self-tapping screw 10-12 mm long with a countersunk head, also apply glue to it, screw the fastener into the drilled hole;
remove any remaining glue from the outside and let the structure dry;
we assemble the bracket - put the spring in place, connect both parts of the device, fix the pin;
if the suction cup has a large free movement, it will not press well against the glass, in this case we cut out an additional elastic band for it;
We put the cap on top, assemble the holder completely, the work is finished, the mount can be used again.

Thus, you can restore almost any bracket for a DVR; the procedure takes little time, and there is no need to buy a new holder.

How to lubricate the suction cup on the windshield

Logically speaking, motor oil wins because... only it is not afraid of temperature changes. Alcohol-containing liquid or soapy/sweet liquid may evaporate in the summer and freeze in the winter and the suction cup will fall off.

Motor oil does not evaporate in summer, and in winter it does not freeze like water, due to its composition. Although, it’s up to you to decide how to lubricate the suction cup.

DVRs are increasingly used in cars: the device allows you to record an accident, and then present the resulting material as evidence. Usually the device is placed on the windshield or dashboard; a suction cup mount is included. But the fastening element does not always ensure reliable installation of the device that records events; it’s a shame if the gadget flies off while moving, sometimes it breaks and fails. In this article we will look at what solutions there are to this problem, the reasons why the holder is so unreliable and weak.

Decoding the symbols on the buttons and connectors of the radio

What should I do to solve the problem?

Based on the reasons given above, let's consider what can be done to prevent the DVR from falling off:

If you find a defect on the new suction cup (external defect, cracks, tears, uneven surface, etc.), return the device under warranty. Such a bracket will not hold the DVR properly. Or buy a new one.

Of course, installation of the mount is carried out strictly according to the instructions given in the service book. Below we will also give a universal algorithm;
The glass or mounting surface must be perfectly clean and dry. It is advisable to wipe the windshield with an alcohol wipe;
Strong heat can soften rubber or silicone, and cold, on the contrary, can make it “oaky.” As a result, the elasticity of the material is impaired, so the suction cup of the DVR does not stick to the windshield. Carry out installation at normal temperature (room) of glass and air inside the cabin. In winter, it is better to drive the car into a warm parking lot.

If the rubber does not hold the main structure due to the uneven surface of the windshield (for example, it is silk-screened, cracked, chipped, etc.), alas, you will have to look for another place for installation. It will not be possible to create an ideal vacuum on such a surface.
When choosing a third-party bracket, make sure that it fits your DVR exactly (weight, area of the suction element, etc. properties).

Under what conditions is it difficult to install the holder?

The most common reason for weak fastening of the DVR bracket is low temperature, usually the suction cup falls off in the cold. This happens because rubber or silicone hardens at low temperatures and loses its elasticity. Also, the rubber band does not hold up in the heat; if you left the car for a while in the sun, you should not be surprised that upon your return you will find a fallen recorder.

It will be difficult to install the holder on glass covered with dust; the rubber circle itself should not be dirty either. The suction cup holds very poorly on uneven glass, for example, if it is silk-screened. Here it is no longer possible to level the surface; you need to figure out how to ensure tight contact. Another thing to consider is that there are a lot of Chinese products on the Russian market, and the fastener may initially be defective.

Suction cup fastening principle

To begin with, let's figure out how the suction cup works, find out how a small elastic band holds a heavy structure. In fact, everything is simple here, so to speak, according to the law of physics. When the suction cup is pressed against the windshield, almost zero pressure is created under it, creating a vacuum (airless space). At the same time, atmospheric pressure presses on the mount from the outside, as if trying to penetrate the area between the windshield and the rubber band. It flows around the structure on both sides, providing reliable pressing (in other words, it continues to press when the installer has already completed installation). However, if even the smallest hole is formed between the rubber band and the glass, air will instantly leak inside. Without a vacuum, the suction effect will disappear and the DVR will inevitably fall off.

What types of fastenings are there?

According to the material of manufacture, they are rubber and silicone;
By type of design - with a lever or simple, with a rotating mechanism (provide strong pressure);
By size – large and small (designed taking into account the weight of a specific DVR model). There are mounts with 2-3 suction cups;
By accessory – universal (purchased separately from the DVR) and native (included with the gadget).

We cannot say which mount is better, silicone or rubber. Here everyone decides for himself; both materials have pros and cons. In our opinion, their chances are approximately equal, and the choice should be made based on the physical properties of the product and the characteristics of the environment in your region of residence.

Methods for unscrewing bolts, screws or screws with licked heads

Of course, a suction cup with a larger holder area holds the DVR better, but it also looks more bulky. As for third-party mounts, we still recommend choosing a gadget with a native one.

How to attach a suction cup to a windshield

clean and degrease the surface;
check the rubber or silicone suction cup for deformation, cracks, damage;
Boil the roughened silicone suction cup in water and soda;
in suction cups with a lever between the suction cup and the body, additionally cut and install a rubber gasket (the pressure will increase several times);
lubricate the suction cup.

On the last point, there are so many people, so many opinions. Some say just spray with an alcohol-containing liquid (vodka, cologne, air freshener), others moisten it with plain water or soap solution, others suggest a sweet liquid (Coca-Cola, or other sweet water, syrup, lollipop and then the saliva will become sweet) or motor oil.

How to attach correctly

To get the best possible chance of securely attaching the gadget, initially attach the suction cup to the windshield correctly.

Using a cloth soaked in alcohol, wipe the surface of the DVR bracket and the surface on which the device will be attached.
Wait for both surfaces to dry.
Press the holder against the glass as tightly as possible. Press the lever and lower it. Release only after 1–2 minutes, until the suction cup is firmly attached to the desired location.
Check the reliability of the fastening. Pull lightly. If it doesn’t work, then you did everything right.
Check outside to see if there are any air bubbles under the rubber or silicone circle.

Types of suckers

As I already wrote, there are usually two or three of them in the mount to better hold the gadget.

And there are single, but massive ones. They are made mainly from two materials - rubber and silicone. Rubber suction cups are dark (often black) in color, but silicone ones are often transparent.

There is a lot of debate about which of them is better. However, in my experience, the regular rubber options held up better. Silicone hardens much more in cold weather, which makes the suction cup less elastic.

Although to be fair, it’s really difficult to choose between these two options! Because there is high-quality silicone, and there is low-quality rubber.

What should I do to prevent it from falling off?

There are only two tasks:

How to properly wash a car engine with your own hands

Clear the atmosphere inside as much as possible.
Don't let that negative pressure escape

This is why the side edges of the suction cup are made so wide! And they try to make the material as elastic as possible so that it adheres well to the glass.

Many people wet the surface with water (or even saliva), this is of course correct, but in winter it can freeze, but in summer it simply evaporates. Therefore, you need a composition that will not evaporate, freeze or harden. Motor oil is ideal, you need a little on your finger, wipe the surface of the suction cup and attach it to the windshield. WILL HOLD ON for a very long time!

The second “jamb” of modern gadgets is the “lever” in the mount, which creates a lot of pressure. Often it makes almost a full turn (180 degrees), but it starts working only at the very pressure, only 25 - 35 degrees, that is, the remaining angle works idle. We need to reduce this idle speed, which is done - a circle is cut out of a regular car camera, along the rim of the suction cup (like a gasket), then all the insides are cut out inside and it is inserted between the suction cup and the body.

Once you start pressing the suction cup with the lever, this “spacer” will reduce the idle speed and increase the pressure inside. IT WILL HOLD SEVERAL TIMES BETTER, tested many times.

Here's a short summary:

Checking the rubber or silicone surface for damage
Degreasing glass
Lubricate the surface of the suction cup (motor oils are ideal because they do not freeze in winter and do not evaporate in summer)
You can make a spacer (ideally from a wheel tire) between the plastic and rubber (silicone) components, thus increasing the pressure

Now we are watching a short video version.

I end here, I think my article was useful to you, sincerely your AUTOBLOGGER.

Traditional methods: working and not

We’ll also tell you what drivers manage to do when their DVR suction cup doesn’t work. We will talk about folk methods, some of which, by the way, are very effective!

Heat the gum slightly by bringing it to the stove (a little bit). At the same time, the interior should also be warm so that there is no sharp difference between the temperatures of the glass and the suction cup;
Glue the suction cup with double-sided tape. At first it holds the recorder, but over time, under the influence of sunlight, it loses its properties;
Lubricate the elastic band from the inside with transparent silicone. Not a bad way, it actually holds the DVR, but as a result, the suction cup will constantly “travel” across the glass;
Place a rubber gasket between the window and the suction cup. This design, indeed, holds better, but it is heavier, which means that the risk that the DVR will one day fall increases;
The contact area on the glass is rubbed with glycerin, garlic juice, and laundry soap. The method with glycerin is questionable, it doesn’t hold up well. Garlic does a better job, but its aroma will not be overwhelmed by any car fragrance. After drying, the laundry soap firmly sticks the DVR to the surface and holds perfectly. But if you want to move the device slightly, you will have to tinker a lot;

Moisten the gum with saliva or water. The liquid really provides a reliable “adhesion”, preventing air from penetrating inside. However, sooner or later the moisture will evaporate.
Treat the suction cup on the reverse side with motor oil. This method holds up well, but the composition itself can have a negative impact on the material from which the elastic is made;
Some “masters,” when the suction cup of the DVR does not hold, put it on super glue, which is strictly not recommended. Firstly, sooner or later the device will fall off anyway. And secondly, think about how much effort you will have to put into cleaning your windshield from traces of Chinese glue?

Mounting methods

Oddly enough, in addition to the main technical characteristics, the method of mounting the DVR plays a huge role

Of course, it is very important that the video is clear and has good sound, but still one of the main roles is played by fasteners. Among the various ways to mount a DVR without using a suction cup, there are three main and frequently used methods:

sticker;
panel mount;
models built into the mirror.

It is very important to choose a reliable fastening method without using a suction cup. After all, the quality of the recorded video directly depends on this.

Sticker

Attaching the DVR using a sticker involves mounting it with double-sided tape. It is mounted on the windshield so as not to reduce the viewing angle. It can be attached behind the rearview mirror.

Positive aspects of using a sticker type fastening:

excellent fixation due to good adhesion to the surface;
long service life;
there is no need to spend a lot of money;
compactness;
You can attach the device in any convenient place on the windshield.

All attachment methods have their drawbacks, and stickers are no exception. These include:

there is no possibility, if necessary, to remove, hide or take with you;
there is no option to move to another location;
you need to use only expensive high-quality tape;
it is necessary to choose models with low weight;
It is worthwhile to mount the device as evenly and accurately as possible, since there will be no opportunity to re-glue it;
There is a high risk of the recorder being damaged by direct sunlight or being stolen.

This type of mount is more suitable for those car owners who park their vehicles in the shade or garage. In addition, the vehicle must be equipped with a car alarm.

Mounting the DVR to the front panel

Some models are mounted on the car panel, that is, on the dashboard. For this type of model, in most cases the same double-sided tape is used. But unlike using adhesive tape in the method described above, fastening to a torpedo is more reliable. This is due to the fact that the level of adhesion of adhesive tape to plastic is much greater than to glass. In addition, the service life is much longer, but the quality of the video material is completely different, because in this position the viewing angle is less than on the windshield.

The advantage of this fastening method:

practicality of fastening;
certain types of recorders are equipped with a special panel;
ease of installation with your own hands;
possibility of removing the device without disturbing the fastenings.

The disadvantages of this mount are quite justified and understandable:

less grip;

attracts the views of strangers because it is in a visible place;
Due to the fact that the wires are visible, it is not aesthetically pleasing.

This fastening method does not require special material costs and is more suitable for those motorists for whom the viewing angle and aesthetic qualities do not play too much of a role.

Models of DVRs built into the mirror housing

To begin with, it is worth noting that when choosing DVRs that are built into the rear view mirror housing, you will need the help of specialists in this field to install it. In the absence of special skills and knowledge, it is impossible to do this on your own.

Positive aspects of this type of recorder mounting:

high-quality type of fastening;
due to the fact that the device is not in a visible place, it does not attract unnecessary attention from strangers;
it is possible to establish joint operation of the recorder, navigator and other similar devices;
high grip angle;
power supply from the general electrical system of the vehicle;
long service life and high level of reliability.

Disadvantages of DVRs built into the rear view mirror housing:

to install this type, you need to call specialists or take the car to special service facilities;
the cost of this recorder is significantly higher than models with other fasteners and, accordingly, you will need to spend additional money on installation;
there is no way to remove the device without much difficulty and then install it back if necessary.

It should be noted that although this method of fastening is the most expensive, the number of its positive aspects is much greater than that of others. This is due to the fact that it is practical, compact and has a pleasant, neat appearance. Don't be discouraged by the installation costs as you will be rewarded with high quality video footage.

Questionable ways to attach the holder

There is a lot of advice that motorists give, but how useful they all are is a big question. Drivers also advise:

lubricate the contact surface with engine oil;
use brake fluid as a fixing agent;
moisten the contact with saliva;
attach the bracket with superglue;
attach the suction cup to the sealant;
To improve contact, use Pepsi-Cola.

Motor oil is a good way to create reliable contact, but we must not forget that the quality of the rubber seal of the suction cup, especially from Chinese manufacturers, varies; the rubber can swell and “float”. Brake fluid and saliva are water-based, and when the moisture dries, the contact reliability deteriorates. Automotive colored sealant does not look aesthetically pleasing; it is possible that traces will remain after its application, but transparent silicone sealant will come in handy. Some people attach the suction cup with superglue, but this seems like a perversion - it is not a fact that the mount will not fall off, but scraping off the remaining glue from the glass will not be easy.

Why don’t suction cups stick to tiles, shelves, hooks, soap dishes, what to do, how to secure them

Smooth gloss is best suited for this purpose. Pores on the matte surface can weaken the bond. And raised protrusions, various surface defects, particles of glue or putty are not at all capable of holding the suction cup.

In order for the suction cup to adhere well to the tile, you need to make sure that the product is of high quality, and that the tile is even, and preferably glossy

It will not be possible to securely attach the suction cup to a chip or crack. Unfortunately, it will not be possible to disguise these flaws in this way. The only way out is to fix the object hanging down a few centimeters above this flaw.

What to do if the suction cup for the DVR does not hold?

Have you ever gotten into your car in the morning and found car glass holders lying on the floor, seat or dashboard? Have there ever been situations when the suction cup for the DVR fell off right on the road, on the next bump? If yes, then we will tell you how to avoid such surprises.

Why doesn't the suction cup hold?

The most common reason is cold. In winter, the windshield freezes, the rubber suction cup loses its elasticity and falls off. In such cases, drivers usually warm up the car, place the suction cup under the airflow and attach it back.

This method, despite its prevalence, rarely leads to long-term results. But sometimes the suction cup doesn't hold up well in the heat.

If in the summer the car is often left in direct sunlight, this leads to numerous sad consequences, one of which is deformation of the holder mounts.

And sometimes the suction cup holder cannot be installed from the very beginning; it simply does not stick to the glass. There are two main reasons: either the glass is dirty or there is a layer of dust on the suction cup, or you got a defective holder.

What should I do to make the suction cups stick?

Act according to the situation. There are several working methods, tested by many drivers, to restore the elasticity of a frozen suction cup.

Warm up the car. Wipe the windshield with alcohol and wipe dry. Warm the suction cup, clean it of dirt and apply it to the glass. To be on the safe side (and if you have the means at hand), before putting the holder back in place, treat the suction cup with clear plumber's sealant or silicone grease.
Budget popular option. Boil the mount in a soda solution for about 20 minutes. To make a solution of suitable consistency, take a teaspoon of baking soda per glass of water.
A completely budget and desperate option for the most extreme case. The suction cup can be attached to glass or a dashboard using double-sided tape. This option is suitable only if you have nothing on hand except tape, and you need to secure the holder.

Most often, the suction cup can be easily returned to its place by simply warming it up and degreasing the area on the glass. But if the mount is deformed or continues to fall off despite all your efforts, don’t worry and just buy a new suction cup holder. An excellent choice would be the Partner car holder for tablets.

What can help?

There are several available tools that will help secure the device efficiently.

But no matter what product is used, first of all it is necessary to thoroughly degrease the surface to which it will be attached.

As a treatment agent, you can use nail polish remover, alcohol, glass spray or soap solution.

Silicone sealant

In order to properly secure the suction cup, you can use transparent silicone sealant. To do this, sealant is applied to the concave part of the device, after which it is pressed tightly against the glass.

But before using the Velcro for its intended purpose, it is recommended to wait 24 hours for the sealant to dry completely.

How to wash the inside of the windshield to perfect condition When preparing the car for a trip, some drivers do not pay attention to the condition of the glass on the inside of the car, but...

Garlic juice

You can also securely attach the suction cup using garlic juice. When it gets into microcracks, it clogs them and thereby prevents air from getting under the device.

Simply rub the surface of the Velcro with garlic juice and attach it to the glass, pressing it down for a few minutes until it dries.

Oil

Machine oil or any vegetable oil applied to the surface of the Velcro helps to secure it for quite a long time, acting in a similar way to garlic juice.

In this case, oil is easily removed from the surface of the glass using a regular soap solution or organic solvent.

Car camera

As you know, a new suction cup always holds better than the old one due to its rigidity.

But there is a way to return the device to its previous strength using a regular car inner tube or any other rubber:

To do this, you need to cut a ring from the chamber, the diameter of which will coincide with the size of the suction cup.
Place it between the plastic and the sticky surface.
An updated item can be treated with oil or garlic, then it will definitely last a long time.

Disadvantages of a DVR built into the mirror

Impossibility of self-installation (only service center employees can do this efficiently and correctly).
Significant financial expenses for a device of this type and its installation.
Lack of mobility (if you change your car, you will need to reinstall the DVR).

This method of mounting the DVR is the highest quality, discreet and aesthetically comfortable, since the wires are disguised and it seems that there is no foreign device in the car interior. But it is worth noting the high cost of the DVR and the process of installing it in the mirror. This type of fastener is suitable for those car owners who are willing to pay a lot of money for the quality of shooting and the safety of the fastening.

When choosing a mount, do not forget to pay attention to the features of your device: dimensions, shooting quality, viewing angles, quality of material, mobility, because based on these parameters and your needs, you can understand which type of recorder mount suits you best

And remember, it’s the little things that matter, so it’s better to attach a high-quality recorder now than to buy another one later

What types of mounts are there for DVRs and their features?

When choosing a DVR for a car, one of the priority parameters, in addition to the quality of shooting and viewing angle, is the type and reliability of the mount. Typically, the device has to work in difficult conditions, for example, driving over potholes, bumps, gravel roads, etc. Therefore, it is very important that the mount holds the recorder well. In addition, many people now, fearing theft, do not leave the device visible on the windshield. Therefore, the mount must provide the ability to quickly remove and reinstall the DVR housing. This means that when purchasing, you must pay attention to the type and quality of fastening.

Main types of mounts for DVRs

In total, DVR manufacturers currently offer devices with three main types of mounts. Naturally, all options have their own advantages and disadvantages, which determine the features of their operation.

Sticker (3M tape)

This is the simplest option for mounting DVRs in the car. There is a strip of double-sided tape on the body; by removing the protective film, the driver can fix the device on the windshield.

pros

Easy to install the device. Everything is obvious here - no additional devices or manipulations are required, you can attach the recorder in a couple of seconds.
Reliability of fixation. This type of mount is considered very stable and strong and holds the recorder body well on the glass.
Possibility of installation in any convenient place.
Minimum sizes. This significantly simplifies the task of installing a video recorder if there is little space in the cabin.

Minuses

One-time use, the device cannot be removed and re-attached to the same tape.
Suitable only for small devices of light weight.
The adhesive base of the Velcro can leave marks and damage the glass.

Mounting methods

Whatever option you choose for attaching the suction cup to the tile, before gluing it, you need to prepare the surface of the ceramic. The work consists of degreasing the installation site using any available method. This can be either treatment with special compounds such as acetone, or regular cleaning of the tiles with soap solutions, followed by thorough rinsing of the surface with water.

in the bathroom, help maintain order, because this accessory allows you to place each item on its intended place

There are several ways to attach a suction cup, the most common of which we will present for consideration:

Degreasing the gluing area. To obtain a better result, use alcohol or acetone. The method is used to attach devices that have a low total weight along with an object that will subsequently be placed on it: a soap dish, a hook for a small kitchen towel.
Treat the working surface of the suction cup with Vaseline. This option allows you to slightly increase the load on the device and use the mount in aquariums.
Using polyethylene circles. If this device was not included with the device with a suction cup, then you can easily make it yourself from a special film for lamination, or self-adhesive film, one of the sides of which has a sticky layer. Having cut out circles of the required diameter from the film, they are glued to the tile, and only after that the suction cup is glued.
Bonding using silicone sealant. This method is used if the suction cup mount is subject to significant loads or the surface to be glued is not glossy. After gluing the device with silicone, it needs to be given time to harden within 24 hours and then the hook or shelf can be subjected to loads.

Thus, by correctly using the listed gluing methods and following the recommendations on the selection of suitable products and methods of surface preparation, the suction cups, which are not entirely reliable and constantly fall off, will serve for a long time and faithfully, fulfilling the duties assigned to them.

Methods to help securely attach the bracket

There are methods that help to secure the suction cup more securely, here are some of them (as car enthusiasts advise):

warm up the fastening element by bringing it close to the heater fan, while the car interior must be warmed up;
use double-sided tape;
coat the contact surface of the bracket with silicone;
cut a rubber gasket along the diameter of the circle and place it between the glass and the holder;
To seal, add a little glycerin to the contact surface; you can also use laundry soap and garlic juice.

Not all of the listed methods work 100%, and there are side effects. The adhesive tape holds up well, but in the sun it heats up and loses its properties. An additional rubber gasket helps in many cases, but you just need to take into account that the DVR becomes a little heavier, the load on the bracket increases (it can break), and adding rubber is pointless on suction cups without a lever. Garlic juice always helps, but not everyone likes the smell it gives off. A solution of laundry soap gives a good effect, you just need to take one thing into account - until the soap has dried, you can move the suction cup on the glass, then everything will set tightly. Silicone should be spread in a not too thin layer, evenly, its disadvantage is that it sets well only after a day; if you drive the car right away, the fasteners may fall off. Another drawback is that the silicone-lubricated holder moves across the surface.

How is the DVR bracket held in place?

A “suction cup” type fastening element is held on the plane due to a pressure difference; when a silicone or rubber circle is flattened on the surface, a reduced pressure is formed inside it. But the bracket is fixed only when the material is absolutely sealed and no outside air gets inside the circle. If there is even a microscopic hole in the rubber band, there will be no suction effect, such a holder can be safely thrown away. The suction cup can only be secured if it is completely sealed, and you cannot press it and immediately release it, in which case it is guaranteed to fall off.

Advantages of attaching objects with suction cups

The main area of application for objects that have a suction cup for attaching them to a smooth tile or glass surface is the bathroom or kitchen. If previously, almost the only accessory that could be stuck to the wall using a suction cup was a hook, today the list of such items is quite extensive and is constantly growing. On sale you can find the following products with suction cups:

hooks;
soap dishes;
glasses for toothbrushes;
shower head holders;
toilet paper holders;
towel holders;
decorative items;
shelves for bathroom accessories and cosmetics.

Most often, suction cups are used in the bathroom.

The growing popularity of products with this type of fastening is due to a number of advantages that the suction cup provides:

a soap dish, hook or any other object can be quickly, within a few seconds, attached to the desired location on the ceramic lining;
In order for the device to be securely held on the tiles, the use of mechanical and electrical tools and drilling of walls for installation of various brackets and clamps is not required;
if necessary, the product can be easily dismantled without leaving traces and transferred to another location;
small price.

Surface quality and suction cup

First of all, you need to make sure that the product you buy with a suction cup will not be unsuitable for fastening. High-quality material must have an absolutely smooth inner surface. It is this factor that determines the choice. Be sure to run your fingers over it. If you feel a depression or bump, it is better to refuse such a product.

Please also note that the shape of the suction cup must be correct. Another important aspect is the assessment of the tile surface

It must be perfectly flat, since it will not be possible to glue the suction cup onto a textured tile. Smooth gloss is best suited for this purpose. Pores on the matte surface can weaken the bond. And raised protrusions, various surface defects, particles of glue or putty are not at all capable of holding a suction cup

Another important aspect is the assessment of the tile surface. It must be perfectly flat, since it will not be possible to glue the suction cup onto a textured tile. Smooth gloss is best suited for this purpose. Pores on the matte surface can weaken the bond. And raised protrusions, various surface defects, particles of glue or putty are not at all capable of holding the suction cup.

In order for the suction cup to adhere well to the tile, you need to make sure that the product is of high quality, and that the tile is even, and preferably glossy