I went home for lunch today and pulled up to the mailbox to get the mail and my rx65 started going balls to the walls on pop. I literally live in the middle of a cotton field 15 miles from town. I have a crack in my windshield that is right in the line of sight of the detector. Could the sun hit the crack just right and make the dtector false on pop? I don't know what else it could be. Anybody got a guess??