I was skeptical, in my rescue/sanctuary, there are a lot of accidents and NOTHING really did that great of a job with the smell. This was my last hope. Last night I went right to the toughest spot, the main litter box room, that has had many years worth of messes. I sprayed the entire floor and baseboards. Whew! It got really bad smelling right after spraying, made my eyes water, just like you said! I let it sit an hour and mopped it up. Once it dried I noticed improvements but it needed more. So I sprayed again, shut the doors and left it over night. I’m so excited to say the smell IS GONE!!!! This product is what pet owners have always needed!