How do I remove hard-water deposits from glass shower doors?
For removing hard-water deposits, use a de-greaser to cut through them. Janitorial supply stores have products specifically designed to remove it. Or, you may want to try automatic dish detergent in a bucket of warm water. The best time to work on this is immediately after you shower when the hot water and steam have already loosened the build-up. You can use a white nylon sponge to scrub. Follow up with glass cleaner. In the future, dry the doors after every shower to prevent further build-up.