This was easy child's brilliant idea. You know how the litter - especially urine soaked litter - sticks to the bottom of the litter pan and even though you scrape it out there is still residue? Last time easy child changed the litter boxes, he sprayed the bottom with Pam cooking spray before he put in the litter. Nothing stuck. Not a thing. It's so easy to scoop them. And much less residual odor left in the box when dumping the litter and putting in new. I've had cats all my life and never thought of this. What a difference it makes.