1. Metallized windshields interfere with RF signals and are increasingly common. (Weird that why stick on headlights will have less metalized?)
2. Windshields significantly vary in height and angle. An angle that works for a standard sedan may fail on a higher SUV with a more vertical facing windshield. (This is what I experienced, SUV may or may not work on the windshield)

This post has been edited by nebula87: Jan 21 2022, 10:58 AM