Grimes wrote in post #8243335
Well, for the rubber weatherseal on my car, I always use silicone spray lubricant. Keeps everything moist and prevents cracking. I think it would work well if you sprayed a q-tip then applied it to the rubber.
I would not use silicon lubricants on my camera anywhere. It will spread and spread and eventually coat everything, buttons, wheels, grip, insidious. If you never touched the seals for ten years, they'll probably be fine. About the only things that might affect them would be baking in the sun and solvents. If you get a grundgy build up from sweaty hands, just take a Q-tip around them, dry or very slightly moist.
The only thing I have seen advised for cleaning the body is a microfiber cloth, dry, or if need be, slightly moistened in a liter of water with a drop of dish soap in it, never anything aggressive. What can you get on there anyway, sweaty hands, nose prints or whatever you pick up on your fingers?
When I got my 5D2, for the first time I wiped down my three-year old 5D1 with a damp microfiber cloth. There was hardly anything visible on the cloth and the camera looks like new.
Obsessive cleaning is likely worse for the camera over the long run than just the occasional wipe when you see something.