F.O.N. Spray stops odors in litter boxes; does not mask them. Removes urine & fecal stains on rugs & furniture, works on Tomcat spray.Breaks down urine and fecal matter, eliminating the cause of the odor.Safe, bio-degradable. Spray directly on stained areas, blot with paper towel after 3-5 minutes. Safe for color-fastmaterials, will not stain. Use daily in litter boxes.