Go Clean GROUT SLAM
GROUT SLAM is a powerful tile and grout cleaner that quickly and easily emulsifies and loosens the toughes soils and stains for easy removal. Grout Slam is also very effective for general floor cleaning and maintenance, wall cleaning and all other general hard surface cleaning. Grout Slam's special formulation of heavy-duty detergents, solvents and surfactants is ideally suited for fire restoration purposes.
Dilution: 1:1 or 128oz to a gal. of water.