I have a problem with keeping my camera body clean. I never noticed until last year when I spent over 7 months out of action because of operations. When I was able to lug my gear around again I noticed a build up of grime on the rubber hand grips. I have tried to clean with many substances including surgical wipes which worked to a degree but not completely. Asking around I have been advised it is a build up of body oils which seems reasonable but no one has been able to help me eradicate the problem. Any one with similar problems and more importantly advice on how to get rid of it .