Just put the cat outside. They're filthy, they stink, and their hair, dander, and smells get into everything eventually. You'll never get it out once it does. You won't notice it, but anyone who doesn't have cats will when they come to your home and that smell follows you around wherever you go. Not to mention their incessant clawing and scratching. As you can tell, I detest these satanic creatures, but if you must have one, just accept the fact that they do whatever they want unless you continuously correct them. On rare occasion, you find a cat that you can set boundaries with. There are a lot of good tips from others on how to do this. I've seen my wife manage to get a few to behave, but she's worked with animals as a vet tech for years. I simply wouldn't have the patience.