I saw the add on Facebook a few times and ignored it thinking what a bunch of crap. Well, I decided to give it a try. I have a declawed kitty that sometimes refuses to use her litter box. Her current favorite place to use the bathroom is the tub. Her poop left a stain and nothing was getting it out. I sprayed this miracle product on it, left it over night and it is gone! I have also sprayed it around the sides of the walls where she also likes to pee and the smell was practically gone with one application. Awesome product and I highly recommend it.