The back up camera in my car has become increasingly cloudy, almost to the point where it is useless. You can see some general shapes in the daytime, but nothing at night. I'm thinking that it is a scratched lens cover from wiping it with a glove/finger when it is loaded up with dirt, slush and ice. The dealer wants a staggering $1200 to replace the entire camera and I'm thinking it might just be a scratched lens cover that could be resurfaced or buffed...Can these lens covers be buffed out or cleaned up without replacing the entire camera?