I have a Rearview Safety camera and monitor setup. It has worked well for the 2 years I have had it. No problems with moister. The only complaint I have is the IR lighting reflects off the class and tends to washout the picture, so the night vision does not work well, except in traffic, where the car headlights light things up.
If all it is is moister and it is not under warrenty, I would pull the camera apart, let it dry out, wipe down the glass and reseal it with RTV. The moister is probably causing the IR leds to reflect badly into the camera. I would bet the camera is actually OK. Once its dry, test it out before you put it back together.