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Why Is It Important to Wash Your Car Regularly?


Liz grew up as a "grease monkey" to her father, who taught her to fix and work with many things. She also enjoys watching auto races.

Keep your car looking new with frequent washing

Keep your car looking new with frequent washing

Reason #1 - Appearances

To begin with, the car just looks better. Sad to say, we live in a world of people who make snap judgments about others based on a one- or two-second first impression. If that impression is you getting out of a filthy car to go into the store, the person next to you may assume that your personal habits and housekeeping are no better.

They will perhaps feel “creeped-out” and be careful not to come to near you, for fear of catching fleas, cockroaches, bedbugs or that general-purpose ailment from your childhood, the dreaded “cooties.”

Reason #2 - General Maintenance

Cleaning your car’s exterior is the perfect time to check for things that may be working loose, such as license plates and frames; headlight and taillight lenses; mirrors; valve stem caps; hubcaps and antennas.

It pays to use the time down on the ground while cleaning the wheels to take a peek underneath the chassis to be sure you have no loose or broken cables or hoses. A worn or broken brake fluid line, for example, is not something you want to find out about while driving.

While washing the car, pop the hood and take a look inside the engine compartment. Look for loose wires; broken cable ties (you don’t want a wire hanging and getting snarled in the fan); loose connections on the battery; loose connections on the air cleaner cover, and so forth. Check to be sure there is no corrosion built up on the battery connections, as well.

Reason #3 - Exterior Finish

Your car is metal. Well, mostly metal, although a lot of plastics are being used these days in such places as bumpers, the linings of the wheel wells and some trim parts. Metal is known to rust. The paint protects the car from the elements, forestalling the process of rusting. The paint is in turn protected by a clear coat, which is what gives the shiny-looking finish to the paint.

Pay attention the next time you see an old beat-up car. The clear coat is all worn off, and the paint is dull. It looks like a primer coat instead of the finish coat of paint. New finish-coat paint will be somewhat shiny by itself, but not nearly as much as after the clear coat is applied. Dirt dulls the finish.

What Makes Dirt Stick?

As you drive, and even while you are parked outdoors, dust and dirt blow around and land on the car. Now, believe it or not, even on a dry day, and especially overnight, there is moisture in the air. Unless you live in an absolute desert, there is going to be moisture. When that moisture hits the dust that has settled on the finish, it makes it sticky, and you cannot now “blow it off.” After a few days or a week, depending upon your climate and how much dust is blowing around, you will notice a dirty film start to appear, even though the car may not yet look very dirty from any distance.

Even in a large city, where all the natural dirt is pretty well paved over, there is still dirt and dust blowing around. The source, instead of Mother Nature’s dirt may be particulate matter from bus exhausts; construction debris; rubber dust from all the tires on the roads themselves, and so forth. These kinds of dirt are even stickier than “regular” dirt, and they stick by themselves without the help of moisture. Add the moisture, and you have a very dirty car. That dirt is damaging to the finish.

There are also run-ins with those rude birds who never like the color of any car, and try to re-paint it to their own tastes. Bird poo is highly acidic, and it will etch the clear coat and paint. Get it off as soon as you notice it, even if it is not a regular wash day.

How Does Dirt Damage the Finish?

As dirt builds up, it traps moisture. That moisture and dirt on the bottom layers are now in continual contact with the clear coat. As you drive down the freeway, the wind generated by your speed is enough to move that dirt around some, and as it moves, it makes tiny scratches in the clear coat. Over time, those tiny scratches become larger ones, and then the real trouble begins.

Once the clear coat is damaged, the dirt and moisture are able to seep underneath and begin to lift and destroy the clear from underneath. Once the clear coat is gone, there is nothing to protect the paint, which is the next thing to begin to be abraded by the action of dirt and wind—and clueless, careless people brushing against the car in parking lots, or stupid kids writing stupid sayings in the built-up dust. All of these things continue to scratch the paint.

Once the paint is damaged, you’re down to the bare metal… and now the problems get worse. A scratch in the paint may be minor, but if it goes all the way through the paint, and exposes any metal at all, even if it’s too small to see with your naked eyes, that moisture and dirt now start working their devilment upon the metal.

Regular washing along with other routine maintenance helps retain your car's resale value.

You’ve seen cars with “bubbled” areas in the paint around the doors or windows. Those are rust bubbles. As soon as the metal is exposed, the process of rusting begins, and it creeps under undamaged paint to cause those bubbles. It can start to happen as fast as overnight, especially if you live in a moist climate near a body of water.* Salt water is the worst: it accelerates the damage exponentially.

*”Near” can be as far as a few miles away—the moisture wicks up into the air and travels quite some distance, but the closer you are, the worse and faster the damage: see sidebar about my father's experience in the Navy.

An Extreme Case

To illustrate how quickly things can rust, I’ll re-tell my dad’s story of his days in the Navy during WWII. He was stationed out on Johnston Island in the Pacific, and he was working in the machine shop.

They had trays of oil stationed around the shop, and all the hand tools were stored in the oil! When they needed a tool, they had to fish it from the oil, wipe it off, use it, and drop it right back in the oil. Failure to do so saw the tool start to rust almost before their very eyes—certainly within the hour!

Obviously, that’s an extreme example in a very hostile environment, but rust happens no matter where you are, and yes, even out in the desert—think of the Ansel Adams photo of a rusted-out hulk of an old car smack in the middle of the desert.

Are Automatic Car Washes a Good Idea?

Oh! An easy, mess-free way to wash your car! Yes, we've all been to these drive-through machines, probably more than once; some on a regular basis.

The trouble is, these are not very good for your car's finish. Most of them recycle the water, which is good for the environment, but maybe not so good for your paint job. There could still be microscopic particles that have not been trapped by the filtering system.

And think about those revolving brushes and spinning whips. Those never get rinsed or washed out, so they are also full of the dirt from everyone's car before you.

When we had the graphic painted on our show car, we were specifically instructed to never, ever take it through an auto-wash (and that was with ten coats of clear-coat over the graphics)!

Auto-washes are just not kind to the finish of your car.

What Happens If You Don’t Wash the Car Often Enough?

Well, if you are very lucky, and you live in a fairly dry area, maybe not much. You might consider that you have a protective coat of mud instead of a clear coat.

Ironically, the older the car, the more possible it is to get away with this approach for a while. This is because they had better paint jobs in the old days. However, the newer cars, with our modern emphasis on doing everything faster and on the cheap, have thinner coats of paint and thinner clear coats.

Besides that, the appearance of the paint is a factor in the trade-in value, so it behooves you to keep it nice-looking. The salesman will likely assume that if you couldn’t even be bothered to wash the car, then there are probably other things wrong with it, including a lack of routine maintenance, which could result in mechanical issues.

Final Thoughts

Today’s cars are almost designed to be throwaway vehicles, as many of our corporations are dealing out planned obsolescence. They don’t expect people to keep a car for 10, 15 or 30 years as people used to do; they expect you to trade it in for the latest model hardly before the ink on your final payment check is dry.

The paint jobs are made to match that expectation, so to keep your car looking shiny and new, you’d better get out there and wash it, pronto!

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

© 2012 Liz Elias


Liz Elias (author) from Oakley, CA on February 14, 2019:

Hello Erwin,

Thanks so much for stopping by and adding your thoughts.

Erwin Magalang from Philippines on February 14, 2019:

I definitely like your tips about the importance of washing the car on a regular basis. There are plenty of benefits when you wash your car regularly. This activity doesn't just improve the appearance of the car but it also prevents rust and corrosion which can result in potential damage. Washing your car regularly can also keep the paint safe from hazardous chemicals which can scrape off the car's protective coat that may damage your paint job. Doing this also saves you money on repairing your protective coat. This is just one of the activity a car owner can do to protect the car from any damage and possible repair.

Liz Elias (author) from Oakley, CA on February 19, 2018:

That's a very interesting postulation. It certainly seems that way! Thanks for such an insightful comment.

Springtex on February 08, 2018:

I'm wondering if all the sensors, RFID transmitters, cameras, etc. on the newer cars create such a magnetic field around them that dirt, dust and other particulates migrate to them and stick more than they used to. Have they become like the radio or TV inside the house, where dust tends to accumulate?

Liz Elias (author) from Oakley, CA on August 13, 2012:

Hi there, barbergirl,

Oh, yes..do let your husband know to wash the cars..and tell him to start with yours for a change. ;-)

My dad never bought new cars; he washed his car now and then...when it looked like it needed it. ... and come to think of it, most of his cars did have dulled paint.....

Now, we wash our cars much more often, and especially if the birds have "redecorated" while we were shopping...that stuff is acidic!

Thanks so much for stopping by and sharing. Glad you liked the hub.

Stacy Harris from Hemet, Ca on August 13, 2012:

My dad is a stickler for washing his vehicle. Well, that started of course when they leased a newer vehicle. For most of my life, I have never known my parents to actually have a good vehicle. Sure, it got us from point A to point B but it wasn't a new car and it was a rust bucket before they even got it. So, when my dad started doing that, I teased him a little.

I, on the other hand, don't wash my car much. However, I don't really see the point. Since I am a stay at home mom, I hardly ever go anywhere so it spends more time in the garage then it does on the road. However, my husband has to wash his car frequently. Not only does he put on several miles getting to and from work, but were he parks the trees drop a lot of sap on the car. Not good for it.

So, great hub and great tips... I am going to go let my husband know that he should wash the cars ASAP!

Liz Elias (author) from Oakley, CA on July 28, 2012:

LOL SweetiePie,

I imagine you were not very old when you tried that experiment. Kids do some goofy things, and often learn lessons the hard way. You are right--most cats hate water, which is why the squirt bottle makes an excellent cat discipline item. Although, there are a few water-loving cats, and I understand that a breed called "Turkish Van" is among them...and some Siamese. A friend of mine had to be certain the bathroom door was fully latched when she was bathing, or she'd find her Siamese jumping in and sharing!

SweetiePie from Southern California, USA on July 28, 2012:

I was being silly about cats. I know this is about cars :).

SweetiePie from Southern California, USA on July 28, 2012:

I decided to let my cats give themselves baths because once I thought it would be cool to see if my cat would float in a toy boat inside a swimming pool, and I got scratched horribly for that. Sometimes we would leave water in the bathtub and if they really wanted to, they could climb in. Most cats in my experience hate water.

Liz Elias (author) from Oakley, CA on July 27, 2012:

LOL, Dolores. Sounds like a single gal I knew who had retired, and proclaimed, "I've reached the point in my life where I wash dishes once a week, whether they need it or not."

Thanks for stopping by and your humorous comment.

Dolores Monet from East Coast, United States on July 27, 2012:

Oh, Dzy, you've burst my bubble. Here I thought that the dirt was holding my car together! Actually, I wash my car regularly. Once a year!

Liz Elias (author) from Oakley, CA on July 01, 2012:

Hello, Anil and Honey,

Thank you for stopping by. I'm pleased you enjoyed the article, and I appreciate you taking the time to leave a comment.

Anil from Kerala on July 01, 2012:

sweet hub,you consider our car as our dress,good.Now i understand that others will watch our cars like our dress.Thanks

Liz Elias (author) from Oakley, CA on June 30, 2012:

Hi, ChristyWrites,

See--dad is right! Don't you hate that? ;-) I'm glad you found the motivation you needed here, and thanks very much for the votes and share!

Christy Birmingham from British Columbia, Canada on June 30, 2012:

My dad keeps telling me to keep my car clean because dirt dulls the paint finish and here you tell me the same! I really need to wash my car and your hub is going to motivate me to get that done this week! Thanks for the useful hub, I vote up and will share too.

Liz Elias (author) from Oakley, CA on June 29, 2012:

Hi, drbj,

LOL no, not exactly--I'm not a fan of automated car washes. I believe I'll add a sidebar explaining why. Thanks for bringing that up, however obliquely. ;-)

Thanks very much for stopping by and commenting. But here's an idea: if you don't want to wash your car yourself--enlist the help of the kids (or grandkids)--especially in summer; they'll welcome any excuse to get soaking wet. Give them buckets of soapy water, sponges, a hose, dress them in swimwear and let them have at it! Hee hee...

drbj and sherry from south Florida on June 29, 2012:

With these clear-cut excellent reasons for keeping one's car clean with regular washing, you, Ms. Dzy, could easily be the poster girl for the Car Washes of America. Trust me. I'm a convert now.

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