There are not enough words to accurately depict how amazing this product is, and how grateful I am for its existence. I'm going on month 3 with my unaltered male foster cat (he can't be neutered right now due to Covid restrictions) and he has sprayed EVERYWHERE in my 3 year old home. I'm telling you - 4 to 5 times a day with this stank spray. It's horrible. But with Eco-88, I have SUCH peace of mind knowing that as soon as I catch it (or find it later, with the black light) it will be gone with nary a trace of sight or scent. It's a brilliant, easy-to-use product, and it is worth every penny. I started with the two smaller bottles and have now moved on to the gallon. As long as I have pets, I will never, ever be without it. If you're having this issue - don't hesitate to get this!!!!!