One of the most vexing challenges during winter is de-icing your car's windshield on frosty mornings. There are several ways to eliminate this problem, but in an article by "AAA” the old ways are said to get the job done: start the engine, set the heater to melt, adjust the airflow to recirculate, and move the temperature control to maximum.
This greatly affects the hot air being dispersed, causing the ice and snow to melt and the car to be ready for safe driving.
Although it sounds like a good idea, it is not recommended to use hot water directly on the car windows.
It can cause immediate damage due to the sudden change in temperature, risking the glass to crack or break.
This happens because the glass cannot withstand the high heat. The use of a glass cleaner is also recommended.