I think Grog was right that I'm probably doing it when I stop...there's one place on my route where I have to scoot over to the pedestrian cross signal button, than scoot sideways to get positioned near the curb cutout to cross. I bet that's it.

Chain cleaning, huh? Heard of it, never done it Seriously, I've been thinking about getting one of those chain cleaning dohicky's (thanks for the link Trek) and they just went up higher on my priority list. I have been sort of wiping the gunk off every once in awhile, but I haven't wracked up many miles yet.

SadieKate, I'm such a newbie I don't even have clipless pedals!

Thanks again for responding.