Lovacott
Über Member
I keep getting bike grease on the back of my legs I think it occurs when I get off the bike and by accident rub my leg against the casette.
I do the drivetrain every other week mainly to remove any grit which might increase wear. I use fairy liquid, a dustpan brush and hot water and rinse it off with hot water from a watering can. Takes me five minutes.
The rest of the bike gets rinsed off with a bit of rain every third commute or so.
As for greasy marks on your right leg when you dismount, please post a video of your dismounting technique.