Very intermittently, the image on my back-up monitor would get very blurry.   Sometimes, turning it off for a while would help.   This was very disconcerting, as I use the backup camera while driving to help with lane changes.

I noticed that this problem happened when it was raining or the humidity was high.   Fleetwood advised to put some di-electric grease in the camera connection at the rear of the coach.   You have to remove the cover over the camera, you will see a large hole in the back cap that could also let in dust and moisture, so you may want to put some insulation in there to help stop the dust and moisture.   (This makes me wonder if there is a need to insulate around the rear cap).

So far, I have not had another recurrence, although we have not driven in wet weather since I made the fix.