On most days, I can clean the camera with a cloth as I depart from home, and on the outset of my journey I have a crystal clear rear camera image. When I get to my destination 20 minutes later, it is dirty enough I can't use it again. If I have to drive in reverse when I get there, I often wind up having to get out and clean it, or rely on my mirrors and turning my head. Is this problem common? Surely there is a way to minimize this. It seems like a design flaw, but the only reliable fix I have thought of would be camera wipers, and that just seems more hilarious than practical. Maybe blinking camera eyelids. Or some tear ducts. More practically, I'm imagining aero- and hydro-dynamic aids that steer dirt and water runoff away from the camera. How do they get so dirty so quickly?