Hi guys, i have been using a product for over a year with great results. Once i have given the wheels a birthday the easiest way to keep them clean is use MUC-OFF, you just squirt it on, aggitate the nasty bits, leave for two minutes and rinse, its completely safe and enviro friendly. I use it every wash and it only takes a couple mins per wheel. You can find this on the net, i buy it in 5 litre cans and it lasts about three months if used sparingly, cost around £19. Found this when i went to look for a quick cleaner for my mountain bike. My Sport wheels are a pain to clean so this means more time down the pub.