What issues should be paid attention to when washing a car?

[Jackie]

When washing a car, avoid randomly adding detergents, avoid using high-pressure water streams to rinse the car body, and avoid using water other than soft water for cleaning. The following are detailed explanations: Avoid randomly adding detergents: Do not use laundry detergent, stain remover, or low-quality soap when cleaning. These detergents contain alkali, which can wash away the oils in the paint surface and accelerate paint aging. Therefore, detergents are generally not added when washing a car. Avoid using high-pressure water streams to rinse the car body: Excessive water pressure can damage the car's paint surface. If there is hard dust or mud on the car body, first moisten it with water and then rinse it off. Use dispersed water streams for spraying. Avoid using water other than soft water for cleaning: This includes hot water, alkaline water, and water with high hardness, as these substances can damage the paint. Using hard water for cleaning will leave marks and a film on the car body surface after drying.