Just a note on the best way to find cat urine or spray areas is with a Ultraviolet LED ( blacklight) flashlight. This is the same flashlight you see them using on all CSI type shows. They can be found online for a reasonable price. I have 2 that I paid $19 for. Just do a google search for "ultraviolet led flashlight for finding pet cat stains" You will find them anywhere from $10 to $1000. They work on all cat stains. After recieving mine, which were bought for a different reason, I found spray marks on walls left behind by a cat that went to the Bridge over a year ago.