Hot or Cold Air for Defrosting?
2 Answers
Use hot air for defrosting. Other defrosting methods are as follows: Using defrosting spray: Using warm air from the air conditioning may take longer. If you want to melt the frost on the windshield faster, you can use a dedicated car defrosting spray. Spray it evenly on the windshield, and the frost will gradually melt. Using plastic tools for defrosting: If the frost is severe, you can use a hard plastic tool to scrape off the frost from the glass. If the frost is light and the outside temperature is not too low, you can lower the side windows slightly to allow air circulation inside the car. This will gradually equalize the interior temperature with the outside temperature, causing the frost to dissipate.
I've been driving for many years, especially in cold winters when the windshield frosts over, I always use hot air to defrost. Because hot air has a higher temperature, it can quickly melt the ice layer, and the effect is significantly better. If you use cold air, although it can remove some fog, the frost won't melt at all, and it will make the glass colder, increasing the risk of frost forming again. When operating, after starting the car, directly turn the hot air to the maximum setting, adjust the air direction to the front windshield, and don't forget to press the AC button to activate the dehumidification function, which can absorb moisture and prevent new fog from forming. Wait a few minutes for the frost to melt before hitting the road, saving time and ensuring safety. Don't just rely on cold air experiments, as the efficiency is too low and it can easily lead to accidents due to poor visibility. Regular maintenance of the air conditioning system can also avoid defrosting troubles.
