One way to remove a stain from a mirror is by using window cleaner. Spray the window cleaner onto the cloth and then use the cloth to wipe the mirror clean. Be sure to avoid getting any of the window cleaner in your eyes.

There are several ways to remove stains from mirrors. One is to use window cleaner. Another is to use vinegar. Another is to use ammonia. Another is to use rubbing alcohol. Another is to use toothpaste.