The key to preventing soap scum buildup on shower doors is to clean them regularly so soap scum does not have a chance to build up.
A solution of vinegar and water in a spray bottle and a squeegee can be used after you shower to help prevent soap buildup. Mr. Clean Magic Eraser also works well to remove the soap scum on glass shower doors. Some people also use fabric softener sheets or a good microfiber cloth to rub down the doors and walls.
Another related issue is if you have hard water – it could be leaving water spots from the minerals in the water. These can be challenging to keep off glass and tile. You may want to consider a water softener if you have hard water.
Please give us a call if we can help you with any of your plumbing needs: The Plumbing Guys (651) 393-6464