Over the winter i've been using Hein Gericke bike cleaner as it's cheaper than muc off, however it seems to leave a whiteish residue on black surfaces. The black gearbox casing in particular. I make sure it gets well washed off with plenty of water but it does'nt seem to make any difference, not sure if it's getting any worse though.
Anybody else had similar problems?
Anybody else had similar problems?