Can dishwashing detergent be used to wash a car?

[OMelanie]

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.

[RowanMarie]

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.

[DelMaci]

Last time I tried to save time by using dish soap to wash my car, it backfired. At first, it seemed to clean well, but after just a couple of washes, I noticed the paint felt rough and was covered in fine scratches under sunlight. A professional later explained that dish soap contains alkaline ingredients that can corrode the paint's protective layer, and the foam residue can clog drainage holes. In fact, dedicated car wash soap contains lubricating agents that reduce friction during towel drying, preventing swirl marks. Now, I always use pH-neutral car wash soap and follow up with a coating agent for maintenance, keeping the paint in excellent condition.

[LaAshlyn]

From a chemical composition perspective, dishwashing detergent contains surfactants and alkaline additives. While effective at removing grease, it is extremely harsh on car paint. Dedicated car wash soap has a pH close to neutral and contains gloss-enhancing agents and lubricants, protecting the paint while improving cleaning efficiency. Using dishwashing detergent not only damages the paint surface but can also cause plastic components to whiten and crack, as well as harden wiper rubber blades. In fact, car wash soap is now very affordable, and even automatic car washes use specialized foam. Don't damage your car to save a little money.

[LaZane]

Can dish soap be used to wash a car? I recommend against it. In the short term, you might save a few bucks on car wash soap, but in the long run, it could cost you more: without proper protection, the car paint attracts dust more easily, increasing the frequency of washes; oxidized paint may require polishing and maintenance costing hundreds; and if rubber seals get corroded, replacements are even pricier. A proper bottle of car wash soap, costing around twenty bucks, can last over half a year, leaving your car shiny and new with less effort. Especially for black car paint, using dish soap leaves obvious water stains, often requiring a redo of the wash.

[NolanLynn]

The biggest issue with using dish detergent to wash cars is residue. The foam it generates is difficult to rinse off completely, leaving patchy water marks on the paint surface after drying, especially noticeable on dark-colored vehicles. These residues can also seep into paint crevices, accelerating rusting of metal components. In comparison, professional car wash soap rinses off easily and can be completely removed with just two rounds of water gun rinsing. Additionally, dish detergent contains no polishing agents, leaving the car looking dull after washing. My current car washing routine follows a standard process: pre-wash solution to soften dirt, main wash solution for cleaning, followed by coating - never using household cleaners throughout the entire process.