Maggie got locked out in the sunroom overnight a couple of summers ago. Unfortunately, she wet on the brand new sofa. I tried a couple of odor removers, including Nature's Miracle, but when it was humid outside, I could still smell the cat urine smell. I purchased ZERO ODOR
(on the recommendation of a TCS member), and saturated the sofa cushions, and the cement floor of the sunroom. I put a couple of fans on the sofa and floor, to dry it. It took care of the residual urine odor, and I've never had a problem with the smell...even in humid weather. I swear by the stuff!!! I put a litter box in the sun room, because Maggie seems to get stuck out there every now and then! She also closes herself in the bathroom. Yeah, not the brightest light on the Christmas tree, lol!