Natures Miracle Advance Stain and Odor Eliminator's bacteria-based formulas produce enzymes when they come into contact with a food source – cat urine, feaces, vomit or other bio-based messes, the enzymatic cleaner will continue working as long as the food source is present. It discourages re-soiling by removing the odor of the toughest cat messes. For use on carpets, hard floors, furniture and more. Safe for use around pets and the home. Leaves a nice fresh sunny lemon scent.