(Spalding Laboratories) Bye Bye Odor Concentrate is a safe and highly concentrated microbial solution that is capable of reducing or eliminating a wide range of organic odors associated with animal waste and urine. The microbes, when wet, consume or break down the urea and other organics that cause the unpleasant smell and unhealthy ammonia build up. Doesn't just mask the odor, but eliminates it. Appropriate for large and small animal odors, indoors or outdoors. Mix 1/2 oz. concentrate with 32 oz. water. Spray liberally on and around odor area.