Mirror looks like it is fogged up
Sounds like the back of the mirror is messed up you would have to put a new silver back on
I use alcohol to clean all glass
Hello there, - Is this an old mirror - sign of age! Antique glass is much desired by some!!
New but has been for a long while in a damp place or been left or kept outdoors?
In any case it is not possible to bring back a mirror that has fogged up due to damp.
But if you feel you want to try - spray canned aerosol mirror much for a perfect job.spay over either front or back, but I don't hold out.
It is probably over 50 years old
Is it a film, or is it going blind? I have some ancient mirrors too and one is going blind just from age.
Try cleaning with a vinegar water solution or rubbing alcohol. If these methods do not produce results, it just may be old and going blind. I have a few old mirrors just for decor that are going blind.
Straight vinegar and newspaper
Straight rubbing alcohol & clean wash cloth(no fabric softener on it)