Use 1 part bleach to 10 parts water on white grout. Whiten discolored white grout by mixing a solution of 1 part bleach to 10 parts water. Scrub grout with the solution and thoroughly wipe all bleach off with a water dampened sponge. Dry the area completely by wiping with a clean cloth and directing a fan on it.

Disinfect tiles grout with a vinegar and water solution. Mix a cleaning solution of one part water to one part white vinegar to clean tiles grout. Dip a scrub brush in the cleaner, scrub for about 30 seconds and rinse all vinegar off your stone with a water dampened sponge. Repeat with vinegar solution and water, until your grout is clean as a whistle. Dry the area with a clean, soft cloth.

Dissolve tile grease with acetone. Cooking grease, milk spills and makeup splatters don’t stand a chance against acetone. Dip a cotton ball in a small amount of acetone and lightly dab any oil-based stains. Immediately flush the area with water from a dampened sponge.

Wash water-based stains on tiles with hydrogen peroxide and ammonia. Get rid of stubborn stains from coffee, tea or pet urine with hydrogen peroxide and ammonia. Rub a small amount of 12% hydrogen peroxide and a drop of ammonia on stains with a soft cloth or sponge. Rinse the area immediately with a water dampened sponge.

Use a poultice on resistant stains. Stains that do not want to disappear with regular cleaning and stain removal techniques require the use of a poultice. Make a paste out of cleaner and a powder, like talc, powdered chalk or dry kaolin clay. Spread the mixture over stains a 1⁄4 to 1⁄2 inch (0.64 to 1.27 cm) thick, cover with plastic wrap, and let it sit for 24 to 48 hours. Mix a 1⁄2 cup (120 mL) baking soda with 1 tablespoon (15 mL) water for oil stains. Mix a 1⁄2 cup (120 mL) talc with 1 tablespoon (15 mL) acetone for water-based stains.