Overview
- The tip stems from a TikTok video by West Midlands account @eden_tyres_and_servicing that was picked up by UK tabloids on December 20.
- The method advises setting the heater to full, switching on air conditioning, turning off air recirculation, and cracking windows slightly.
- The video credits a former NASA engineer and says the sequence clears glass by exchanging humid cabin air for drier outside air.
- Commenters reported mixed effectiveness across vehicle models and noted limitations for cars without the necessary HVAC settings.
- Readers suggested alternatives such as water-filled bags or scrapers, with warnings that pouring warm water can risk shattering glass, and UK law requires windscreens be cleared before driving.