My cat sleeps under my bed now because when he tries to sleep next to me, I end up tossing and turning while I'm asleep. So it wakes him up. I swear I think that he's offended. He's the greatest cat.
Sell the cat on and buy a dog. Spray the top of the case with something that will overpower the cats senses, it'll avoid the case that way? Make a hole in the side of the case as a massive 'vent'