For most drivers, the rear defroster button is an afterthought. You jab it on cold mornings, watch the frost melt into streaky rivulets, and then forget about it until the next weather event.
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How to defog your car windows fast

Car windows fog up on rainy days from high humidity and condensation. You need to clear those windows, fast, or poor ...
Most cars are equipped with defrosters for the windshield and rear window to improve visibility by clearing fog, ice and snow. Most defrosters rely on the heat from a car’s engine, but some vehicles ...