turn on the windshield wipers. Last I checked there were no water jets, wipers or other cleaning devices for the camera lenses on any Tesla. Again, maybe it seems like a small thing, but its still something you would have to worry about. Imagine driving down a dirt road and your autonomous car becomes disabled until you get out and clean the cameras.
Maybe this would be a problem sometime in the future when autonomous cars don't have manual controls anymore, but if the cameras were disabled for some reason you can just take control and drive off the dirt road your self, and head to a car wash.
I don't see this really being a problem that has to be worried about.