no, they're not all that clean. they have to poop somewhere, and if they make a home in your house, one spot becomes the bathroom.
i had one living in the attic of an old apartment once. my landlord was on vacation, so i had to wait to call him to get an exterminator to trap the masked guy.
so, i went into the attic, armed with a flashlight and 10 foot fishing rod, intending to poke at him to get him to go out through the hole he used to enter/egress the attic, then close said hole to keep him out.
i got him cornered near the hole, but had to squeeze me body into a really tight spot to try to force him out. there i was, barely able to move, laying prone with a pole in one hand and flashlight in the other, poking away at his chubby little body. then, in a flash, he disappeared. the next sound i heard was angry little chirping noises, directly behind me.
i wished i'd never watched cartoons as a kid (lol, or adult), because all i could picture was him standing behind me with a huge hammer, waiting for me to turn over.
after screaming like a school girl, i wriggled out of my precarious position and gave up the fight.
racoon = 1, me = 0.