My windshield-mounted EZ-Pass transponder isn't registering when I pass through toll stations. EZ-Pass has been manually charging my account and told me if I don't fix this, they would start charging me a fee (in addition to the normal toll amount). I admit I may have brought this upon myself by tinting the windshield with an IR-blocking film which still transmits 75% light. ....on a side note - decided on the windshield tint after a few road trips when I felt the A/C was having a hard time keeping the interior cool. LOVE IT! The EZ-Pass folks said I could get a license plate mounted transponder because they've seen this problem (with the windshield units) on Teslas. My car is registered in FL (can get away with that while living in Va Beach because I'm active duty Navy) so I don't have a front license plate, and I'm concerned a transponder on the rear plate wouldn't work because the rear hatch could shield the transponder from the sensor as I drive under it at a toll station. Anyone have a similar issue? Anyone using a plate-mounted transponder on the rear plate?