I have one of the large booda domes that have the stairs. One of my cats started peeing on the stairs and its REALLY annoying. I scoop my box twice per day. I only use one box for the three cats, as my house is small and there really is no other place to put a litter box where my toddler can't get into it. Should I start scooping 3 times per day? I tried a second box in the bathroom but it lasted about 2 days until I got sick of stepping on litter, and taking a baby gate up and down really sucked every time I had to go to the bathroom. I tried covering the stairs with carpet but someone still pees on it then drags the litter catcher thing under the box on top of it. Or anything they can find, I found they had covered it with a dish towel, and once my son's coat. Tonight when I found the pee the box was "clean" as far as litter boxes go so I don't know. I am really thinking about biting the bullet and getting a litter robot.