In most of the car washing tips mentioned by the automobile experts, you will find out that they have mentioned neither too hot water nor too cold water. In fact, it is suggested that you wash your car with warm water, which is neither too hot nor too cold. If you are handwashing your car, then it is useful if you mix the car washing soap or liquid with warm water and then wash off the car with normal water, which we have at room temperature. This proves to be suitable for car paint.