@Rober
This is my option as I have a large infra red HD BlackVue camera on the back, it is used as effectively as rear view mirror, every time I get out in rain it gets a wipe, the washer jet would work well I think, just to get rid of the droplets and give a uniform covering. The glass is coated with Rain X too.
Alternatively independent washing nozzle could be mounted next to the camera and directed at the lens.
This is my option as I have a large infra red HD BlackVue camera on the back, it is used as effectively as rear view mirror, every time I get out in rain it gets a wipe, the washer jet would work well I think, just to get rid of the droplets and give a uniform covering. The glass is coated with Rain X too.