[kaybe]

For short city trips, you want to have an old cheap outdoor bike (otherwise it might get stolen anyway). I don't see why you have to clean those. (I clean my bike once every 6 months, tops, and I ride it every day. The dirt is from the dirt or forest tracks I have to cross once in a while.)

[ciupicri]

Not here in Bucharest. There's some mud on the streets and on my bike too. Though I admit I haven't cleaned it up too much yet :-D