How do you soulfully break the news, "Sellers, your house STINKS!".

There are some terrific and powerful ionizers that do well with take urine smells out of the air. I bought a 400.00 one and offer it to clients and friends and I located it in our family room when it is not loaned out as I have a dog and 2 cats. One helper to try and locate the smell is I have a black light and in dark rooms it lights up the smell culprets whether on the carpet or on the walls (if a cat sprays). A carpet cleaner told me about this years ago. the brand of the ionizers was Alpine Living Air. I think you can find them on the internet under a new name. I even bought a small one that plugs into my lighter in the car and I run it after I take my dog for a ride to the vet. They smell like after a thunder shower.