Causes Black Spots On Bathroom Mirrors and How to Prevent

Mirrors have a myriad of other uses apart from the usual use. Perhaps the most useful aspect of a mirror is its reflective feature. We use it to check whether we are presentable to the world before we step out of the house. However, there are other equally important uses of mirrors.

This unique item is one of the most affordable household products in the world. It is used by interior decorators to create illusions of space in a relatively small room. It is also used to create luxurious house decorations.

In case you live in a dark house, you can use mirrors to brighten up your spaces. Better still, you can create a focal point and make a dull room livelier. On the other hand, one of your walls could be having an imperfection that you cannot rectify right away. Instead of wallowing in the ugliness of this defect, you can use mirrors to hide it.

With that said, keeping the mirrors clean and shiny is essential. However, sometimes black stubborn spots appear on the mirrors. Let’s find out what causes the spots in just a few minutes.

Causes of Black Spots on Mirrors

Black spots on a mirror can be caused by a variety of factors. Cleaning substances that get behind the glass can cause black spots to emerge around the mirror’s edges. If the black spots are in the center of the mirror, moisture or cleaning agents have gotten into the rear of the glass.

What causes black spots on bathroom mirrors and how to prevent

Some of the ways in which black spots occur are:-

  • Poor ventilation around the mirror

Make sure there’s enough space between the mirror and the wall for ventilation. The silver backing of the mirror will begin to rust when it is flat against the wall and moisture is trapped, generating the black spots.

  • Temperature fluctuations

Black patches might sometimes form as a result of drastic temperature fluctuations. Avoid storing your mirror outside or in unheated regions. While installing it, keep it in a consistent temperature environment. When the temperature changes, the mirror’s surfaces shrink and expand, causing damage to the mirror and the appearance of black spots.

  • Excessive moisture

It’s possible that the mirror was exposed to too much moisture in its former location or during transportation. If you’ve just bought a new mirror, make sure it’s thoroughly dry before putting it up. Avoid putting any mirror in a place where it will be exposed to water or steam. If this isn’t practical, such as in a bathroom, ensure sufficient ventilation. Also wipe out any extra moisture to keep the mirror in good shape.

  • Exposure to chemicals

Ammonia-based chemical cleansers can harm the mirror backing and edges, resulting in black patches. When cleaning your mirror, window cleaning solvent ideal for cleaning glass surfaces can cause harm to your mirror. Thoroughly wipe any remaining cleaning solvent puddles that might have been left in the corners.

How to Prevent the Occurrence of Black Spots

  • Attach some desiccant to the back

If you have any desiccants around the house, tape one to the back of your mirror.This will assist in absorbing excess moisture. If your mirror is fairly large, use as many desiccants as necessary to completely cover the rear. Moisture build-up leads to formation of black spots.

  • Use a custom frame

You may have desired a frameless mirror to give your bathroom a unique look, which is excellent. However, if you want to avoid these black spots detracting from the beauty, you’ll need a framed mirror or install frames yourself.This frame will serve to protect the mirror edges from moisture and air.

  • Use a dehumidifier

A dehumidifier in the room with the mirror can also assist eliminate the extra moisture that causes the spots to form.

This isn’t a foolproof approach for preventing black spots on your mirror, but it helps. All you have to do now is take care when bathing, brushing your teeth or washing your hands, in front of the mirror. Avoid spilling water on the mirror as much as possible, and dry it as soon as possible.

Even if you’ve observed all the precautions, black patches might still appear. They can, fortunately, be corrected. You can use aluminum foil or a silver color spray paint to cover the spots where the coatings have torn away from the mirror.

Repairing Black Spots

  • Hide the Damage:

If the damage is near the mirror’s edge, you may cover it with a frame made from a variety of materials. You can make an artistic embellishment over the entire piece if the damage is in the middle of the mirror. Make an effort to be innovative.

Around the mirror, for example, you may use beautiful glass beads or tiles. To conceal the damage and create a frame, mirror stripping can be used around the edge. For a unique effect, use liquid lead to outline certain designs and stained glass paint to fill them in.

  • Resilver a Mirror

If your mirror is severely damaged and there is no way to cover it up creatively, you can try removing the silver backing and replacing it with a new piece of mirror. This may be done professionally for a large fee, or you can do it yourself for a lot lower fee.

Frequently Asked Questions

How do you prevent black spots on a mirror?

Avoid storing your mirror outside or in unheated regions. While installing it, keep it in a consistent temperature environment. When the temperature changes, the mirror’s surfaces shrink and expand, causing damage to the mirror and the appearance of black spots.

Why is my mirror getting black spots?

Because it is desilvering and this is the source of the black patches. Even the best-kept bathroom mirrors, however, can acquire them over time. When these black patches appear, they are typically just an eyesore.The black spots may be hidden with a carefully placed indoor plant or other attractive object.

Can you fix black spots on a mirror?

If the black spots are in the middle of the mirror, moisture or cleaning has gotten into the back and caused damage. There is no method to get rid of the black patches in either situation. The only way to fix the mirror is to repaint it or conceal the stains with a new finish.


At this point, you can confidently take care of your precious mirrors. Whether they are in the bathroom or in any other space does not really matter. However, there may be stubborn stains that will not vanish even after trying all the solutions available. If this happens, consider calling a mirror cleaning expert or replacing the damaged mirror with a new one.

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