This is super helpful. I've lived in cold weather for many years and had rocks hit the windshield on other cars but never had to stop using the defroster to keep it from spreading. I guess the glass is more fragile because of all the sensors. Oh well. I'd love to find a way to warn others...
My windshield cracked in cold weather with the defroster on, while driving on a deserted highway in the snow. No car to kick up a stone and no stones because the ground was covered with snow. Nothing hit the window, it just cracked. Then I put on the defroster to heat up the car the next...