Recipe 1: Fill a spray bottle with lemon juice. Spritz the lemon juice onto the mold or mildew. Sprinkle or rub salt over the top and scrub it in with a sponge or scrubber to form a paste. Let it sit for 20 to 30 minutes before wiping it away with a wet rag.
Recipe 2: Mix ½ cup of white vinegar with 10 drops of tea tree oil in a spray bottle. Mist onto the surface, wait about 30 minutes, then wipe with a clean, damp cloth.