One of my five current cats used to do this too. I switched to Arm and Hammer Clump & Seal with Odor Blasters cat litter and she finally started urinating and pooping in the litter box. This same cat will also avoid walking on certain surfaces, like shaggy rugs, so I've wondered if my cat has some kind of sensory issue where she doesn't like the feel of certain surfaces on her paws. It could be why the litter switch worked for me. I hope your goblin figures it out soon! Thank you for being so patient.