The cat is a purebred Russian Blue. And yeah, the floor has been sanitized, cleaned with pet odor cover-ups, etc.. It is also a hard lenolium floor so odors sticking in carpet fibers isn't an issue.

As for tin foil, I've thought of that, but I also know the cat. If there's tin foil in the spot, he'll just go to another spot on the edge of the foil to the point where he'll start going under the kitchen table if it the foil covers enough floor.

I'm curious if anyone knows cat psychology. Why would he have no problem peeing in a box, but not pooping? The box is empty as far as things that would gross him out. The other cat doesn't use it, it's clean, brand new, etc... He'll pee in it all day long, but when it comes to the other, he feels that's more appropriate next to the box, not in it.

Would something like putting him in a large dog carrier with nothing but food, water, and his box work? So he HAS to go in the box? He's never used a box since we got him so maybe he just needs to see that it isn't as bad as he really thinks.

***Frustrated***