and the simple fact is, DONT BLOW HOT AIR at your windsceen after you've defrosted it...
once its melted and you are warm, knock the temp down or redirect it away from the screen...
BECAUSE.......the glass gets so warm, that all the spray from the road, which is dirty and salty this time of year, dries really fast...
that means you end up "squirting" twice as often.
If the spray hits the screen and stays cool it wipes away with the normal wiper action.
Been playing with it today...deffo works....
you doneed some air up on the screen so you dont mist up, but keepit cooler.