Fighting Ice With...Ice?

If you live in a part of the world with cold winters, you probably know the awful feeling that comes with an unexpectedly early frost or snow--one that covers your car in a layer of ice before you've pulled out your gloves and ice scraper for the season. The one that makes your fingers freeze in anticipation as you blast the defrost and pull out a credit card so that you can begin chipping away at the windshield. You know the kind. Even if you don't live in a place like that, you've probably exp...