A driving expert has shared the correct way to defog your car windscreen quickly by using either hot or cool air while the air conditioning is on – and it’s left people amazed
While some drivers know exactly what to do when their car windshield starts to fog up, others start to panic as they lose vision of the road. For clarity amidst the condensation chaos, TikTok’s @thecompletelytheorytestkit shared whether you should use hot or cool air to counter the issue.
She told her followers: “In wet weather, if you have heated windscreens, turn them on. Alternatively, use hot air conditioning and point this at your windscreen. Gradually increase the heat every few minutes to clear the windscreen. The reason you use hot air is due to the difference in temperature inside and outside of your car.”
Commenting on her post, one relieved user confessed: “Omg, I’ve always struggled with this!” Meanwhile, another noted: “Hot air and ac, this will clear quicker. Unfortunately, though, I have to wait for the heat to work when first starting my vehicle in winter.”
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One more user said: “Hot or cold works for me, as long as the A/C is on it’ll clear within seconds.” Another user chimed in, saying: “Better to wipe it with a paper towel so it actually removes the water from your car instead of letting it cool down every day.”
Echoing this advice, Auto Express states: “Some people may argue cooler or cold air will help demist your windows, however warmer air can absorb more water and moisture than cold. So while it may take a few minutes for your car to warm up, it will help clear your windscreen quicker. Opening a window will help bring in the dry air from outside – ready to be warmed up and absorb moisture. This is also a good method to help demist your car should you not have air-conditioning to speed up the process.
“Of course, this may not be possible if your windows start to fog up while you’re driving along, but if you’re demisting your windscreens before setting off, standing outside the car may help as your breath is warm and wet, which will slow down the demisting process. Don’t just leave the car with the keys in to demist on its own, as it has been known for opportunistic thieves to hop in and drive away a demisting car.”
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