I have a cat that refuses to aim down in the litter box. I put a new litter box in the fireplace and always had to clean the cement when she sprayed over the back of the litter box.
Solution:
http://img.photobucket.com/albums/v2...g?t=1184156924
Now I can pull the tote box out and wash it easily. No more odorous cement.
The tote is a Duratote 21.5 gal., costs under $5.