Look to NBC 4 consumer reporter Liz Crenshaw for this cold-weather advice.
Question: Is it bad to pour warm water on your frozen windshield to help it defrost?
Answer: We checked with automotive expert Pat Goss to get your answer. Pat says it’s a horrible idea to pour warm water on a frozen windshield. The shock of warm water on a cold windshield can cause it to crack. He says auto windshields are not able to withstand sudden temperature shifts. In fact, Pat says there have been cases where defrosters turned on high have damaged windshields. So on cold winter mornings, you need to scrape and give your car time to warm up.
And never pour on the warm water.
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