Why are there brown spots on mirror?

These dark spots are caused by “mirror rot”, or “desilvering.” Unfortunately, even the most well-kept bathroom mirrors can develop them over time. When these dark spots develop, they usually start out as little more than an eyesore you can hide with a strategically-placed indoor plant or a similar decorative fixture.

How do you fix a mirror that has spots?

Tear off small bits of aluminium foil and use the clear adhesive tape to tape those pieces over the black spots, being sure the shiny side of the foil is against the back of the mirror, and that the foil is as smooth as possible. Once all spots are covered, replace the frame of backing and rehang.

Why do old mirrors get spots?

When the mirror is flush against the wall and moisture gets trapped, the silver backing on the mirror will begin to oxidize, causing the black spots. Excessive moisture: The mirror could have been exposed to excess moisture in its previous location or during shipping.

How do you clean oxidation off a mirror?

Several easy tips can help your mirror regain its former glory:
  1. Newspaper and white vinegar. Using a spray bottle, sprinkle some of the vinegar over the filmed spot. …
  2. Use shaving cream. Any regular shaving cream would do. …
  3. Pure water with microfiber cloth. …
  4. Bring your old mirror to a jeweler.

How do you touch up a mirror?