Apply anti-fog spray specifically designed for mirrors, install a small defogger pad behind the mirror, or position a vent fan to blow directly across the mirror surface.

Buff minor scratches with toothpaste or metal polish. For deep scratches, apply a mirror repair kit or replace the glass.

Apply painter's tape in a grid pattern across the mirror surface, then use a putty knife to gently pry it off the wall while supporting the weight. For glued mirrors, use a heat gun to soften the adhesive first.