Nature's Miracle Advanced Stain and Odor Eliminator for dogs works to discourage re-soiling by removing the odor of dog messes. The bacteria-based formula produces enzymes when it comes in contact with bio-based messes including severe urine, diarrhea, vomit and blood. The Stain and Odor Eliminator is safe to use on carpets, hard floors, furniture, fabrics and more, when used as directed, and leaves you with a light fresh scent.DIRECTIONS FOR USE: Before using, test surfaces to be treated for colorfastness by applying to a hidden area. Wait 5 minutes, then wipe with white cloth. If color is removed from the test area, do not use Nature's Miracle Stain & Odor Remover on those surfaces. Do not use on untreated hardwood, leather, suede, silk or wool specialty fabrics. Always use this product at full strength. Do not dilute. Always use Nature's Miracle Stain & Odor Remover products first. Other cleaners and detergents may fail and chemically "set" stains that will be impossible to remove.