Use: For glazed tiles, one capful of isopropyl alcohol in one gallon of water. For unglazed tile, like terra-cotta, a few drops of dishwashing liquid.
Tools: A cloth or mop.
Tips: Rinse with water and a clean cloth. Avoid oil soaps or ammonia, which will yellow grout. Avoid vinegar, which will damage grout.
Tough stains: Use a scraper or putty knife to remove stubborn debris. Use a nylon scrubbing pad dampened with dishwashing liquid to remove stains from grout. Apply grout sealer twice a year to prevent stains.