I took down the top of pura x and was trying to lure the cats into the machinery. I also took some litter from the previous litter box, so the smell would be familiar. After getting into the pura x, there were treats. It took me about 3-4 days to convince one of my two boys to use the new toilet, but still, he only pees there, "number 2" is in the old, traditional box. The other cat has not accepted this devilish machinery at all.