I hear you all, but I have two problems, firstly I don't dare park outside my flat as its a bit of a rat run and I see bumps/scrapes too often. So I search out the quietest street around, within my zone and park there. I don't really have time to check it every day, so when I found the poor thing covered from head to toe in guano I panicked...
There is a v good car wash service near my office, but it's closed due to Olympics at the moment, charge a small fortune but good enough for a monthly tart up.