18/08/2026
Cold wet morning and the windscreen won’t clear?
A lot of people turn the heater up but switch the A/C off because they’re trying to get hot air. The trick is that A/C also removes moisture from the air, so you can use warm or hot air and have the A/C running at the same time.
For a fogged-up windscreen:
Windscreen vents → warm/hot → A/C ON → fresh air → fan up.
Avoid recirculation while clearing condensation because it keeps moist cabin air inside. Plenty of modern cars automatically select A/C and fresh air when you press the windscreen demist button.
Using the A/C regularly through winter can also help keep the system healthy. Refrigerant oil circulates through the system and helps lubricate components and protect rubber seals in the lines and connections. A/C systems vary between vehicles, so follow your manufacturer’s guidance—but it definitely isn’t just a summer button.
Save this for the next foggy morning—or send it to someone who always switches the A/C off. 💡
