STAIN-X® Pro quickly and safely returns grout to like new!! STAIN-X® Pro Grout Cleaner is the safe and easy way to clean dirty grout. This non-acidic formula is odorless and 100% biodegradable so it is safe to use around your family and pets. Spray it on , use the included brush, and mop to restore your grout to like new...that's all there is too it! Easy To Use Leaves No Residue Odorless And Colorless Cleans And Restores Your Grout To Like New