Sun glare via the windshield will probably be decreased through conserving the internal glass freed from movie
https://wiki-aero.win/index.php/Windshield_Repair_in_the_Rain:_Is_It_Possible_or_Safe%3F
Sun glare simply by the windshield may well be decreased by means of maintaining the inside of glass freed from movie, which basically builds up from interior cleaners and plastics.