As temperatures plummet across Britain, drivers face the same frustrating morning ritual: battling fogged-up windscreens. But now, the AA has stepped in to settle a debate that has divided motorists for generations - should you use hot or cold air to clear your windscreen faster?
The Great Demisting Dilemma Solved
Contrary to what many drivers assume, the AA reveals that cold air is actually more effective at initially clearing condensation from your windscreen. While it might seem counterintuitive during chilly winter mornings, there's solid science behind this surprising recommendation.
Why Cold Air Works Better Initially
"Cold air is less humid than warm air," explains AA experts. "When you blast cold air onto your windscreen, it absorbs the moisture causing the condensation much more effectively." This means you'll achieve a clear view significantly faster during those crucial first minutes of your journey.
The Smart Switching Strategy
However, the AA recommends a clever two-stage approach for optimal results:
- Start with cold air to quickly remove the bulk of moisture
- Switch to warm air once the screen is clear to maintain visibility and comfort
This method not only gets you on the road faster but also ensures you stay comfortable throughout your journey.
Additional Expert Tips for Crystal-Clear Visibility
The AA shared several other crucial tips to combat windscreen misting effectively:
- Use your air conditioning alongside your demister, even in winter - it's a powerful dehumidifier
- Keep windows slightly open initially to equalise temperature and humidity
- Regularly clean your windscreen inside and out - dirt particles attract moisture
- Check your cabin filter - a clogged filter reduces airflow and demisting efficiency
- Consider anti-fog products for persistent condensation problems
The Fuel-Saving Bonus
This demisting technique offers an unexpected benefit: potential fuel savings. Since your car's engine doesn't need to work as hard to heat cold air compared to warming it up, you might notice improved fuel efficiency during shorter winter journeys.
As one AA spokesperson noted, "Getting this simple technique right could save you time, fuel, and frustration during the coldest months. It's one winter driving hack that actually delivers on its promise."
So next time you're faced with a foggy windscreen on a frosty morning, remember: start cool, finish warm, and drive safe.
