I started using a small plastic squeegee in my shower to keep the hard water stains and soap stains to a minimum, although it didn’t last long (too cold to be cleaning the shower down after the water stopped).
Store bought cleaners listed below will remove stains on your surfaces. Remember that you should clean hard water stains away regularly. The longer they sit, the harder they are to remove. If stains remain for long periods of time, the stain may become permanent.
A good home cleaning remedy is plain white vinegar and lemon juice. Lemon juice is an acid, and it helps to loosen and remove hard water deposits from glass shower enclosures. Apply a generous amount of cleaner and agitate with a nylon scrub brush and rinse off using a plastic squeegee for best results.
A commercial acid based cleaner found in any janitorial supply stores are what professional cleaning companies use to scour hard water deposits. Caution: Use eye protection and gloves when using these commercial cleaners.
Lime-A-Way or CLR are products that remove stains or hard water deposits, rust stains and soap scum. There are tub and tile cleaning products that remove soup scum and also contain sequestering agents and heavy duty acids such as phosphoric acids. Caution: Use eye protection and gloves
Glass shower doors become stained easily with hard water deposits. The lime scale attracts soap scum, dirt and mold and mildew. To remove these stains with this buildup, try cleaners made for hard water scale or lime removal such as Wink, Zud or Comet.