I saw another thread about this issue but didn't see if anybody ever found a resolution. I have two different garages. One is a two car garage with some shelving in the back and typical garage stuff. No issues in that one. The single car garage is totally separate with nothing at all inside except for white drywall. It is a small garage with basically just enough room for the car to go in and for you to open the door halfway and get out. When I pull into the small garage everything is fine. But when I come back later and start the car it immediately uses the windshield wipers, and then after a few seconds increases the speed, and after a few more seconds is at max wiper speed. I'm guessing there is something with the smaller garage that is faking out the rain sensor but I'm not sure what that would be since it doesn't seem to happen when I first pull in.