can i use fairy liquid to wash my car

[DeSkylar]

No, you should not use Fairy Liquid (or any standard dish soap) to wash your car. While it will remove dirt, it is formulated to cut through tough grease on dishes, which makes it far too harsh for your car's paint and protective coatings. Using it can strip the wax and sealant, leaving the clear coat vulnerable to UV damage, oxidation, and contaminants.

The primary issue is the chemical composition. Dish soaps are highly alkaline to dissolve grease, whereas pH-neutral car shampoos are specifically designed to clean without damaging the clear coat—the transparent layer that gives your paint its gloss and protection. Fairy Liquid will degrade this layer over time, leading to a dull finish.

For a proper wash, use a dedicated car shampoo. It creates more suds to lift dirt away gently and often includes lubricants to prevent swirl marks. Here’s a comparison of the key differences:

Characteristic	Dish Soap (e.g., Fairy Liquid)	pH-Neutral Car Shampoo
Primary Purpose	Cutting grease on dishes	Safely lifting dirt from auto paint
pH Level	Highly alkaline (approx. 8-11)	Balanced, pH-neutral (approx. 7)
Effect on Wax	Strips wax and sealants quickly	Preserves existing wax protection
Long-Term Impact	Dulls paint, promotes oxidation	Maintains gloss and protection
Lubrication	Low, increases swirl mark risk	High, lubricates to prevent scratching

Stick to products made for automotive finishes. The few minutes and dollars you save aren't worth the potential hundreds it will cost to correct the damage later.

[LincolnRose]

Definitely not. I learned this the hard way on my old truck. It seemed like a quick fix, but after a few washes, the paint lost its shine and started looking hazy. Dish soap is just too strong—it takes off the protective wax along with the dirt. Now I only use a proper car wash soap. It’s cheaper than a new paint job.

[VonCecilia]

Think of it from a cost perspective: using dish soap is a false economy. A bottle of quality car shampoo costs around $15 and can last for 20+ washes. Using Fairy Liquid might save you a few cents per wash, but it systematically degrades your car's paint protection. This leads to premature fading and oxidation, which can cost anywhere from $500 to $3000+ to repaint or correct. Protecting your car's factory finish is one of the simplest ways to maintain its resale value. Invest in the right tool for the job.

[StBryce]

My dad always told me, "Son, use the right tool for the job." Washing a car with dish soap is like using a sledgehammer to hang a picture. It might work, but you'll probably damage the wall. Your car's finish is delicate. That dish soap is designed to dissolve baked-on grease; it's way too harsh for that thin layer of clear coat keeping your paint shiny. Grab a proper car wash solution—it’s designed to be gentle and effective.

[FernandoAnn]

For a vehicle owner who values their car's appearance, the answer is a firm no. Automotive paint systems are complex, with a clear coat designed for specific chemical interactions. Dish soap introduces aggressive surfactants and a high pH that this system is not designed to handle. It compromises the integrity of the paint, leading to a loss of gloss and depth that is difficult to restore. For preserving showroom-quality finish, a dedicated, pH-balanced shampoo is non-negotiable. It’s a fundamental part of proper paint care.