Can Laundry Detergent Water Be Used to Wash a Car?
2 Answers
Laundry detergent can be used to wash a car. Below are the precautions for car washing and the reasons for using laundry detergent: Precautions for car washing: Avoid washing the car under direct sunlight. This can leave dried water droplet marks on the car body. Avoid washing the car in extremely cold weather. If water freezes, it may cause the paint film to crack. Avoid washing the car before the engine has completely cooled down. This can lead to premature aging of the engine. Avoid using high-pressure water streams to wash the car body. Excessive water pressure can damage the car's paint surface. If there is stubborn dirt or mud on the car body, soak it with water first and then rinse it off. Reasons for using laundry detergent: Laundry detergent itself has excellent grease-removing capabilities. Its grease-removing ability can be nearly 10 times higher than that of dish soap. Laundry detergent is easy to rinse off. Generally, laundry detergent has an indicator for residue after rinsing, which ensures that most of the detergent will be washed away with just a water rinse.
I once used laundry detergent for convenience to wash my car, but soon after, fine foggy spots appeared on the paint. The car wash technician explained that the alkaline substances in the detergent could corrode the protective layer of the car paint, accelerating aging. That's when I switched back to professional car wash soap. Regular laundry detergent is designed to remove human body oils, not vehicle grease and dirt. Long-term use can cause plastic parts to discolor and rubber seals to age and leak, eventually forcing you to spend money on repainting. My experience taught me that saving a little money isn't worth it—it's better to buy a bottle of professional car wash soap for just over ten dollars, which has a neutral pH and won't harm the surface. Also, when parking, avoid bird droppings and tree sap. If these stains occur, promptly wipe them off with a small cloth dipped in a specialized cleaner to prevent deep-seated damage.