I never leave rubbish in my car, so the inside is always neat (except for some dirt that builds up from shoes on the carpet, and things like dust and whatnot). The outside, however... I'm super lazy and rarely clean mine. Because whenever I do, it'll either rain the next day or a bird will poop on it. I park mine on the street so it gets really dirty really quickly. Ugh. So annoying. Can't wait to have a garage one day. xD