Driving expert's 'correct' method to defog car windscreen quickly as winter hits

A TikTok user has come to the rescue for drivers struggling with foggy windscreens. User @thecompletelytheorytestkit advises: "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."

Users have been quick to respond, with one saying: "Omg, I've always struggled with this! " Another added: "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."

A different user mentioned: "Hot or cold works for me, as long as the A/C is on it'll clear within seconds." While another suggested: "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."

Auto Express offers some clarity on the often debated topic of demisting car windscreens, reports the Mirror. They advise: "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."

Additionally, they caution drivers by saying: "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 opportunist thieves to hop in and drive away a demisting car."