So winter has started and I've found a flaw in design of the defrost for the windshield. It's been fine in snow and rain. But I hit some freezing rain on the highway and for some reason the center of the windshield kept icing up. So I felt the vent to see if there was airflow in the center and noticed that the center of the vent isn't an air passage. It only exits to defrost in front of the driver and passenger. Most cars have airflow right across the entire top of the dash. It's really an annoying flaw cause the camera is right in the center and in freezing rain it just builds up ice right in front of the camera.