Cloudy glass is often the result of hard water, which contains minerals such as calcium and lime. These minerals can leave behind deposits and water spots, forming an unsightly film on your shower doors. If accumulated on the glass for too long, hard water and soapy buildup can cause etching, which is permanent and irreversible damage. A deep cleaning will eliminate buildup, but it won’t remove etching.  Daily maintenance will cut down on deep cleanings and prevent the glass from clouding. Geller advises, “The best way to cut down on the time, elbow grease, and amount of product needed to get the job done is to either rinse the shower of soap residue or use a squeegee or clean towel to dry the area after showering or bathing.” You can also check out our guide on how to clean cloudy glass.