I clean keyboards with water - put them in the sink and run water over them and perhaps use an old tooth brush to scrub a little. Perhaps this would work on a gentler scale with the camera. It is important to let it dry thoroughly, I tend to use the sun as we are having a drought but hair dryers also work (but not too hot!). I learned this trick from an IT person years ago. Alcohol sounds a bit drastic but many people seem to turn to it.
Larry
February 2007