(BOB VILA) DIY Deicer When temperatures dip overnight, you can expect frost on your windshield in the morning. Rather than remove it with ice scrapers or commercial deicers, try this DIY treatment. Secure a spray top to a bottle of rubbing alcohol, and then coat the wintery windshield. After thoroughly dousing the glass, watch the ice melt away, leaving you with a frost-free windshield and a streak-free shine.