The Tile and Grout Cleaning System a specially designed brush tool with two unique rows of bristles working with a powerful cleaning solution to help you inexpensively handle any difficult tile and grout cleaning challenge, particularly those in hard-to-reach areas. Easy four step process: Pour cleaner unto floor Use white bristles to clean top of tile surface Use black bristles to clean grout lines Wipe excess cleaner with Microfiber cloth/towel (included)