Backup camera cover/wiper

I've had this project in the works since I bought my car. I have most of the design work done, which consists of an actuator to cover the camera lens, except when backing up. The cover contains a soft wiper pad which slides over the lens, keeping it clean. I have all the components and the 3D printed housing, but I haven't mounted it yet, because I'm finding that I don't really need it, so far.

Volkswagen uses a retractable camera, which keeps it out of the mud and rain, until it's needed. That's what inspired me to design this mod, but I'm finding that the existing placement of the Prius backup camera is located in a place where it seldom gets wet or dirty.