1. Don't wash the car before it rains, as you may know. Because when it rains, you wash the car in vain and stick mud spots. So don't wash the car before it rains, so as not to waste your time.
2. Wash the car after it rains. Some people may think that when it rains, they don't need to wash the car. God helps wash the car. But the rain is not clean, which will damage the car paint. After the rain, you still need to wash the car.
3. If your car is going to be waxed, it's better to wash the car in the shop and dry it after washing. Otherwise, the car can't be waxed when it's wet, and it won't be as clean as the car wash.
4. When you wash the car, if you do not have a foaming agent, you can mix some with the spirit of washing. It can remove stains on the surface of the car.
5. When washing the car, spray water on the car first to wet the surface. Wait a moment, but don't rub. Especially when there is a lot of mud on the surface of the car, too much force will scratch the paint.
6. When washing the car, you should also pay attention to that many cars are brake discs, that is, disc brakes. If it's winter, the car will freeze when it's set outside for too long after washing, which will cause the car can't start. It can be boiled.