Regular cleaning can be done with detergent and water, and rinsed; or commercial household cleaners or bathroom cleaners used according to label directions. Do not use scouring powders or other abrasives which can scratch the finish.

Special cleaning may be needed for ceramic tile in bathrooms if there is a buildup of: soap scum, a rough white coating, or mildew.

Remove soap scum by sponging with a mixture of 1/2 cup packaged water softener, plus 2 tablespoons rottenstone plus 1 cup hot water; or use a solution of 1-2 tablespoons trisodium phosphate in 1 gallon hot water. Rinse.

Remove mildew by cleaning with a dilute solution of chlorine bleach in water, following label directions on bleach. Rinse. Or use a mildew-retardant household spray.

The rough white coating is a buildup of mineral from hard water (like you get in a teakettle). Dissolve it with a commercial tile cleaner and wipe off.

Occasionally a dark varnish-like stain may build up in a tile shower that has not been cleaned regularly. It is a build-up of body oils and soap scum and very hard to remove. Cover the spot with full-strength liquid laundry detergent and let stand for a couple of hours. Then sponge with water. If it still doesn't all come off, leave detergent on longer and scrub with a brush. Don't use on porcelain enamel tubs or fiberglass or plastic surfaces as it may damage them.

This article was written by Anne Field, Extension Specialist, Emeritus, with references the Ceramic Tile Institute.