Can dishwashing detergent be used to wash a car?

2 Answers
OMelanie
07/23/25 8:50pm
Dishwashing detergent should not be used to wash a car as it can damage the car's paint. Due to its degreasing properties, while it can remove dirt from the car's body, it will also strip away the car wax, leading to paint peeling. This not only affects the car's appearance but may also cause rust. Precautions for car washing include: 1. Do not wash the car when the engine is not completely cooled down, as this can cause premature aging of the engine. 2. Avoid washing the car under direct sunlight, as it can leave dried water spot marks on the body. 3. Do not wash the car in extremely cold weather, as water freezing can cause the paint film to crack. 4. Avoid using water other than soft water for washing, as it can damage the paint.
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RowanMarie
08/10/25 6:45pm
As someone who frequently washes my car by hand, I must say dish soap is really not suitable for car washing. While it does have excellent stain-removing properties, the strong detergents in it will gradually strip away the protective wax layer on the car's paint. Over time, this will cause the paint to lose its shine and may accelerate aging. Additionally, dish soap produces too many bubbles that are hard to rinse off completely, often leaving water spots behind - not to mention the damage it can cause to plastic parts and rubber seals. I recommend spending just a dozen yuan to buy a bucket of dedicated car wash soap. Its pH level is specially formulated for automotive paint, making it safe and worry-free to use. The results are far superior to using dish soap, leaving your car sparkling clean with a brilliant shine.
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