My Monster:wipe round wheels etc with WD40 soaked rag after most rides & also lube chain whilst hot
I use muckoff if bike comes in grotty, then WD too, then autoglym for polishing tank, fly screen etc.
Also, I remove bellypan once a month, to check if anything loose/leaking etc under the crank casings
Cleaning it is more for an 'all-round check' for safety, as much as having a tidy looking bike too.
C
Edited for Steve: 6,500 miles since Xmas this year - none commuting - all pleasure:P
[Edited on 29-6-2005 by CK and AK]