Every winter, it never fails, a rock will fly up- smack into my windshield, and leave a huge crack. I know this is really common in Alaska, because the well below freezing weather contrasting with the heated inside of the vehicle makes the glass more fragile. It seems like everyone I know has replaced a windshield at least twice. Is there an alternative to this though? Is there some way to help prevent your windshield from cracking from rocks in very very cold weather?