Why Does the Screen Protector on the Phone Come Off?

why does the glass come off

by Alex Gustman

Updated: April 27, 2022

The protective glass gives the screen extra strength and durability. At the same time, due to mistakes made during the installation of the glass, intensive operation and lack of care, the protective coating peels off and becomes unusable. The article contains the main reasons why the protective glass on the iPhone comes off, as well as ways to solve the problem.

Insufficient screen treatment before glass installation

It is important to thoroughly clean the screen before applying the protective coating. Greasy spots, stuck dirt, dust or small debris prevent the glass from snugly fitting to the screen. Bubbles or air layers form, which impair the display of information. If the air voids are located on the edge of the glass, such places will quickly collect various debris and spoil the adhesive coating. As a result, the connection to the screen will be broken, and the glass will gradually peel off until it breaks or comes off completely.

Solution: clean the glass and restore the adhesive coating

Remove air bubbles by following the instructions in the article on how to remove bubbles from the protective glass of the phone. Wipe the screen thoroughly with an alcohol wipe to remove debris and accumulated dirt around the edges of the screen before re-installing the protective coating. Use Guide Sticker or office tape to collect the debris from the back of the protective cover.

glass cleaning

If air layers form at the edges after reinstalling the glass, restore the adhesive ability of the glass with glycerine or an appropriate reducing liquid. Apply a few drops of liquid at the place where the glass is detached. After a while, the tool will fill the void under the glass and provide the necessary connection to the screen.

In some cases, UV gel may be needed to firmly connect the glass to the screen. The method of applying the product is similar to a conventional liquid, while the UV gel must be dried using an ultraviolet lamp or under the sun. The frozen gel firmly holds the glass, eliminating peeling in places with a broken or missing adhesive coating.

Debris on the edges of the glass

Most safety glasses do not cover 100% of the screen area. On each side, there is 1-2 mm of space where dust and other debris accumulates. After some time, the adhesive base at the edges of the glass weakens and leads to peeling of the glass.

Solution: cleaning the glass

Periodically clean the surface of the glass and in places where debris accumulates. To do this, use cleaning kits that include liquid and soft rags. Some kits also include a brush to remove debris in hard-to-reach areas.

cleaning glass on a smartphone

Unevenness and chipped glass

Some safety glasses initially contain defects in the form of irregularities, flimsy or damaged adhesive base. Problems are usually found with cheap and fake glasses. Also, the glass is often peeled off in damaged areas where there are chips or cracks.

Solution: exchange the glass or eliminate the identified defects

Before buying protective and other accessories, always ask about the availability of a warranty and the possibility of exchange or return, in case of defects. And if you find any visible defects in the glass, agree with the seller to exchange or return the glass.

If the return and exchange is not possible or the manufacturing defect was discovered after a while – fix the defects or install a new glass. The most common problem with defective glass is unevenness or an adhesive base that has dried at the edges of the glass. In most cases, treatment with glycerin or UV gel helps in places where the glass does not fit properly to the screen.

replacing glass on the phone

Damage to the adhesive base of the glass

The adhesive base of the glass at the edges is easily damaged by the use of aggressive cleaning agents: isopropyl alcohol, alcohol-containing makeup remover, etc. As a result, voids are formed at the edges, which are clogged with garbage and accelerate the peeling of the glass.

Solution: Use only suitable cleaning agents

Recommended cleaning products do not contain alcohol or the alcohol concentration is so low that it does not harm the adhesive base.

In places where the adhesive base is damaged, you will need to restore the sticky layer with glycerin or UV gel. If such places are clogged with garbage, you will need to remove the glass, clean the contaminated areas, and then install the glass back.

Chips and cracks on the screen

Some users install protective glass on the broken screen to fix the damaged areas. At the same time, in places of chips or cracks, the adhesive coating is not enough to fill the voids formed as a result of damage to the glass. Therefore, in such areas, the joint strength is low, which often leads to peeling of the glass.

Solution: fill the voids with sticky liquid

In most cases, the application of glycerin or liquid adhesive in the places of chips or cracks will help. The tool will fill the voids and ensure a tight fit of the glass to the screen. To fill the voids in the places of large chips, it is better to use UV gel, which will provide the best fixation in the places of the damaged screen.

restoration of the adhesive base


How do I keep my screen protector from coming off?

It is necessary to thoroughly clean the surface of the screen before installing the tempered glass. It is also advisable to clean the screen protector 1-2 times a day with a cleaning fluid.

How do you put a screen protector on perfectly every time?

Clean the phone screen of dust and dirt beforehand. Then install the tempered glass screen protector and smooth out accumulated air with a cloth.

What kind of glue is used on a screen protector?

The composition of the adhesive backing may vary with each screen protector. Silicone is usually used.

How do you make a glass screen protector stick back?

If the adhesive backing is still intact, it may be enough to reattach the tempered glass. If not, you can use the adhesive that comes with UV glass. Apply this adhesive to the screen protector before you reinstall it.

Can you restick a glass screen protector?

The tempered glass can be reinstalled several times before the adhesive backing is damaged.

Are screen protectors easy to remove?

The plastic protective film is easy to remove. Tempered glass is harder to remove. And the glass that was installed a few months ago is even harder to remove.

Can a screen protector be removed and replaced?

You can easily remove the tempered glass and install it again. The plastic film cannot be removed and reinstalled.

Does removing the screen protector damage screen?

No, the removal of any screen protector does not damage the screen. The only exception is if you use a sharp, hard object to remove the screen protector and scratch the screen.

Can you make a screen protector sticky again?

You can repair the adhesive base of the tempered glass with UV gel or other adhesive fluid.

Are screen protectors permanent?

You can use tempered glass for 2-3 years until the coating wears off. The protective film usually lasts 6-12 months.

How long do phone screen protectors last?

Tempered glass consistently lasts for 2-3 years; less in adverse conditions and severe climates. Protective film usually lasts up to a year. In adverse conditions, 1-2 months or less.

Are tempered glass screen protectors durable?

Yes, the strength of tempered glass is enough to protect the screen in case of impact or fall. In addition, the protective glass takes up all scratches, so that the phone screen remains scratch-free

When should I replace my tempered glass screen protector?

When the protective glass is completely worn out; also in the case of deep and severe scratches, in the presence of chips and cracks or simply when you want to replace it with a new one.


The article describes in detail why the protective glass on the iPhone comes off. The protective coating is usually peeled off due to insufficient fixation of the glass with the screen. This is facilitated by the debris that got under the glass at the time of installation and by the natural wear of the coating or damage by aggressive cleaning agents and the lack of periodic cleaning.

Cleaning the contaminated areas and restoring the adhesive base will help to solve the problem of detached glass. In most cases, a liquid for removing air layers will be suitable for fixing the glass. For uneven glass or in the presence of chips and cracks, it is better to use UV gel, which provides the most durable connection of the glass with the screen.

What questions do you have? Leave messages in the comments below the article.

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About the author 

Alex Gustman

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