The innovative grout cleaning foam clings to the surface and penetrates the toughest dirt, mildew stains and grime on kitchen and bathroom tile. Removes dirt build-up, set-in stains and hardened soils faster and easier than all-purpose, bathroom and tile cleaners. Goo Gone Grout & Tile Cleaner is surface safe for porcelain tiles, ceramic tiles, fiberglass and natural stone (including granite). Works to remove dirt build-up, set-in stains and hardened soils.