Yeah, I have the rear wiper running at all times, but it still isn't fast enough to deal with the accumulation of rain or slush.
Same as you all, I use my finger or napkin to wipe off the cameras all the time.
Mainly, I was wondering if there was a solution that didn't require cleaning them off so frequently. I'm a little surprised that the vehicle puts the spray onto the window, as opposed to leaving it behind.