I too yesterday was wishing I had a rear wiper...it was just enough moisture on the back window, along with the 8 cubic meters of pollen that I couldn't hardly see out of it. For the most part though, a fresh coating of Rain-X (I know, Regex or whatever seems to be highly spoken of here) should assist with that. I've got like 2 bottles of it sitting around from the past couple years where I never used it. And what's one more mechanical device on a car such as a hybrid?