I had the same problem. Replacing the camera with a new one is a bear, because the cable goes all the way through to the dash / radio (no disconnect at the camera end). I unscrewed the camera housing, unscrewed the gasketed cover on the underside, and was able to dry it out; then replaced the cover with a bead of silicone sealant added, and screwed it back on the body. Is working fine.
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