We recommend COMET BATHROOM CLEANER to keep your shower doors looking new. You should be able to find this in most grocery stores. COMET BATHROOM CLEANER comes in a 32oz. If you see mildew starting to form around your shower doors or inside your shower itself, combine into a spray bottle, a mixture of 1/3 Clorox with 2/3 water. Spray heavily around the bottom of your shower doors where you see mildew. Allow it to stay there overnight and rinse out the next morning. If you have a bad mildew problem, repeat nightly until it gets better.