Always XKCD
https://what-if.xkcd.com/119/
Lasers on a windshield are only partially less stupid than a laser umbrella. But this is Elon. He is one of those "so stupid they are a genius" persons sadly. Lasers might work. But I'm sure a more reliable "life time" quality option is there. A wiper that lasts 20 years is more than enough (plastic or some other material that wears at a known rate and shape and still wipes).
Biting the hand that feeds IT
