We have an 8 year old neutered cat who started having passive aggressive issues about his little brother getting too much attention and he marked all over our guest room / office area. We cleaned everything we could with this spray (and threw away what we couldn't), and it has worked WONDERS. Before we used this, he kept going back in and marking new areas. After using this, we have had no incidents of marking in over two months! We're even using a black light to check for pee (we also used this technique when cleaning the room). I am incredibly thankful for this product. It has restored sanity to our home, helped boost confidence of our little beta cat, and allowed us to keep our 8 year old in the house.
Rating: [5 of 5 Stars!]