Experts have warned drivers against using boiling water to defrost icy windscreens, cautioning that the method can cause significant damage to the vehicle. The warning comes after a number of viral videos on TikTok promoted the technique as a quick solution to remove frost.
The RAC (Royal Automobile Club) has stated that pouring boiling water over the windscreen creates a thermal shock, as the glass goes from sub-zero temperatures to nearly 100 degrees Celsius in seconds. This can crack the windscreen, leading to an expensive repair bill.
Instead, the RAC advises using a proper windscreen scraper and de-icer, and allowing about 10 minutes to clear the windscreen thoroughly. They also recommend placing a windscreen cover on the car the night before to save time in the morning.
Other tips include using a dry towel secured under the wipers, or a piece of thick cardboard, to prevent frost from forming. Drivers are warned not to use newspaper or other flimsy materials, as they can become damp and freeze to the glass.
To prevent interior fogging, the RAC suggests starting the heater with cold air and gradually increasing the temperature as the air dries out. It is also important to ensure all windows, mirrors, and lights are clear of ice before driving.
