I use a normal APC. I don't use vinegar or bleach as these are acidic and will attack the rubber making it crack and go white in the long run. Clean with an APC or very diluted vinegar if you insist on using it. Then protect it with amorall/gummi pflege.
Black Sapphire BMW Z4 sDrive35i
Mods: HiFi Tweeters Stubby LED Halos & Front Indicators DVDInMotion SmartTop 313 BMW Performance Alloys LCI Repeaters http://goo.gl/PF4nSz