Cat Odor Eliminator 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, biodegradable. Spray directly on stained areas, blot with paper towel after 3-5 minutes. Safe for color-fast materials, will not stain. Use daily in litter boxes. Contains SL-25. Use of ammonia or vinegar prior to using FON will greatly diminish FONs ability to work. Cat Litter Boxes Spray F.O.N. daily in cat litter boxes. A light spray covering the surface area will suffice to eliminate odors. Maintain usual sanitary procedures for the litter box. F.O.N. is biodegradable. Urine and Fecal Stain Spray F.O.N. on stained area after 3-5 minutes blot with paper towel. Process may be repeated on old stains. F.O.N. neutralizes odors and cleans simultaneously. Tomcat Spray Follow the above procedures. F.O.N. may be used on rugs and other colorfast materials. F.O.N. will not stain. Caution:Due to the nature of the product, F.O.N. spray is cloudy and contains fluffy swirls and flakes. This is normal, and in fact, necessary from the standpoint of efficiency, and doesn't effect the spray system. The use of ammonia or vinegar prior to using F.O.N. will greatly diminish F.O.N.' s ability to work. Old stains that have set may not respond to F.O.N. as dramatically as do new stains. If fabrics are suspected not to be colorfast, it is recommended that F.O.N. be tested first on an unexposed portion of the fabric prior to using on the stained area. F.O.N. Spray (Feline Odor Neutralizer) 1 Quart Spray Refill. I do not receive this product or any others in exchange for this article, I do get a commission for readers clicking the buy now links which helps to differ the cost of hosting this blog and I sincerely hope this article site helps you with your search for Vet Approved Rx products.