I have two girls. My older 7yr old sprays when she pees, and it smells sooo bad. I use covered litter boxes and Dr elseys clumping clay litter. I scoop once sometimes twice daily and deep clean once a week or every other week. I've just now started to try out lining the pans with puppy pads, but I can tell that is going to get expensive fast. Anybody have tips or tricks they use in situations like this?