Back up Camera is not clear

[daveor]

I have a 16 silverado and the truck has been back to the dealer 3 times for the same thing,, the first time they replaced the camera,, looked like it had water in it, then the next time, I don't know what they did,,but cleared up, was fine for a while,, now it is fuzzy again, seems to be right in the center, top to bottom, sides seem to be fairly clear. they said that gm would tell them to check all the connections and they said they would have to have the truck for probably a week to pull the seats and the carpet out to check them all, this is my only vehicle, didn't ask if they would give me a loaner, said there were 4 connections. The lines are fine, it is just the picture that is fuzzy, all stock, no leds, lens is clear, anyone have any ideas, Thanks