Are you damaging your car when de-icing the windscreen?

Consumer Editor

4 minute read|5th Jan 2026

According to new research, nearly one in five motorists are unknowingly putting their vehicle at risk by pouring boiling water onto a frozen windscreens this winter.

This quick‑fix method, often used on icy mornings, can cause the sudden temperature change that leads to cracks, chips, or even a completely shattered glass.

The findings from eBay highlight how common this risky habit is and underline the need for safer de‑icing practices during cold weather.

This new survey has revealed that almost half of UK drivers may be damaging their vehicles simply through the methods they use to clear ice from their cars on cold mornings.

According to the data, nearly one in five drivers (19%) admitted to pouring boiling water over frozen windows in an attempt to defrost them quickly.

While it might seem like an easy shortcut, the sudden temperature shock can cause the glass to break, leading to costly repairs.

The research also showed that around 30% of drivers rely on their windscreen wipers to scrape away ice.

This bad habit can put unnecessary strain on the wiper motor and can tear or blunt the rubber blades, reducing visibility and increasing the likelihood of needing replacements sooner.

Together, these findings highlight how common winter‑morning shortcuts can unintentionally create bigger problems for drivers, reinforcing the importance of using safer, vehicle‑friendly de‑icing methods.

The survey also revealed that a significant proportion of drivers are taking risks before they even set off.

Around 18% of drivers admitted they are comfortable leaving their engine running to warm up and defrost the car.

Even more concerning, 15% said they would walk away and carry out other tasks while the vehicle is left idling and unattended.

Not only does this increase the chance of theft, but it also breaches Rule 123 of the Highway Code, which makes it illegal to leave a vehicle with the engine running while unattended.

Drivers caught doing so can face a fine, adding a financial sting to what many see as a harmless winter shortcut.

Abir Tewari, UK Director of parts and Accessories at eBay, said: “Following the first cold snap of the season, we’re seeing motorists use a range of methods to clear their windscreens – some more effective and safer than others.

“It is vital drivers prepare their vehicles properly for challenging winter conditions.

“That’s why eBay offers a wide selection of tried, tested and safe solutions to make cold mornings simpler and safer.”