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Stash a piece of bubble wrap, just slightly larger than your windshield, in the trunk of your car. If you're parking your car outside for the night and the weather's turning foul, lay the bubble wrap across the windshield, and secure it with the wipers before heading to bed. This plastic barrier will help keep frost from forming and collect any snow that falls. In the morning, simply peel it back to reveal a clear windshield in seconds.
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