"Sparkle" Cleaner does those glass cleaning jobs too tough for spray-on cleaners. It removes light water spots and stains in glass caused by weather, sea air or pollution; also removes soap scum from shower doors and ceramic tile. Use it on auto glass to remove water spots from automatic windshield washers. Wipe on with a damp cloth or paper towel, rub stained areas, then wipe off.
After this, use TPC Polymer Spray on Coating
, which prevents stains, repels water.