How to Wash Your Car Under Direct Sunlight

Washing car in direct sunlight - mobile car detailing

While some people advise against it, you can actually wash your car under direct sunlight with the proper tools and process.

Here’s how: first, hook up a water deionizer to your water spigot. Next, attach a garden hose or pressure washer to rinse and foam down your car.

Then, fill your bucket with distilled water, and soap, and use clean microfiber wash mitts to scrub your car clean. Lastly, wipe the surface using large drying microfiber towels and a leaf blower. Don’t forget to wear a hat, a pair of sunglasses, and sunscreen!

Car Washing Under Direct Sunlight - Car Wash and Detailing

Is it bad to wash your car in the heat?

We all know leaving your car outside on a hot sunny day with no shade for a long period of time is a bad idea. Washing your car under the heat of the sun, on the other hand, can be doable.

People usually avoid washing their car in direct sunlight because water and soap tend to dry quickly. This can leave unsightly water spots and streaks all over your vehicle. But if you do it right and quickly, washing your car in the summer heat can be safe.

How do I prevent sun spots when washing my car?

A portable water deionizer is the best tool to wash your car without getting water spots. It removes minerals from the hard water (mainly Calcium and Magnesium) and purifies the water so it’s suitable for washing cars on a hot day.

Guess what? If you want to know how to remove, prevent and avoid water spots on your car when washing on a hot day, we can help!

Here’s a step-by-step guide on how to wash your car under direct sunlight like a pro.

Step 1: Wear proper attire

Wearing a proper attire is vital when washing your car under the heat of the sun. You should consider wearing a hat, long sleeves, work pants, gloves, and a mask.

Having the right protective gear keeps you safe from getting sunburn, inhaling chemicals, and preventing dirt from getting into your eyes.

Other than protecting your skin against the heat, it’s also important to hydrate. Make sure you have a large water flask or bottle nearby to refresh yourself.

Washing your car on a really hot day is no joke. Worst case scenario, you can get dehydrated and pass out.

That being said, don’t get stuck washing a particular dirt or grime. If it’s taking you longer than usual to remove a particular dirt, try removing it at a different time of day when the sun and heat is not too much.

Step 2: Start Washing the Wheels And Tires First

An expert car detailer knows that removing dirt on the wheels and tires first is the smartest thing to do when washing your car. You’ll want to clean the dirtiest part of your vehicle first before the paint.

If you clean the top of your car and work your way down, you’ll risk splashing dirt and brake dust back on your clean paint.

Once you remove the dirt and rinse the wheel, it will no longer splash dirt onto your paint. After you’re done washing the car, you can now dry the wheels using a leaf blower and microfiber towels. That way, you prevent getting water spots on the surface.

Step 3: Use a Portable Water Deionizer

One of the most useful tools you can invest in for washing your car is a portable water deionizer. It’s the best tool to prevent water spots from forming on the surface of your vehicle.

You can buy any water deionizer depending on your needs. River Islands Car Salon uses On-The-Go portable water deionizer. You can buy from other brands such as Adams, Griot’s Garage, CR Spotless, etc.

So how does a water deionizer help in keeping your car safe from water spots?

Water spots form when hard water dries on your car’s surface. Washing your car under the heat of the sun makes the water dry on the paint faster.

 One way to avoid water spots from forming when washing your car on a hot day is by using a water deionizer. 

The hard water passes through the deionizer and removes the dirt and minerals (mainly calcium and magnesium) in the water, making it soft.

This way, even when you’re washing your car on a hot day, you won’t have to worry about the water drying quickly on your paint and forming water spots because it’s been deionized.

Owning a water deionizer has its pros and cons. It’s advantage is that you get 0ppm soft water when washing your car but then it can be heavy and expensive for personal use.

Step 4: Wash Section by Section using the Towel Method and Rinse-less wash solution

There are many ways on how to wash your car while conserving water especially on a hot day. One of which is by washing each section with a towel and using a rinse-less wash solution.

Use the towel method in order to avoid scratching your paint. You can combine this method with a rinseless wash solution. Just as the name suggests, you’re going to need several towels, a bucket of a rinse-less wash solution and start the washing process.

A rinse-less wash solution acts like a car soap minus the suds so you won’t have to rinse or hose it off. You can use Optimum No Rinse (aka ONR) , a very popular product among expert car detailers.

You can read more about how to wash your car using the towel method and rinse-less wash solution in our how-to guide.

Step 5: Use Spray Wax as a Drying Aid

Now that you have washed your car section by section using the towel method with the water-saving rinse-less wash solution, you can now apply spray wax and wipe.

The area you sprayed wax on will be protected from the area you’re about to wash. You can apply the final layer of your chosen wax inside the garage for further protection.

Aside from acting as a protective layer, spraying wax on your car’s surface also acts as a drying aid after washing your vehicle. This helps make sure that your car is well protected from the heat of the sun.

Step 6: Wash and Dry Quickly

It’s important to try to wash and dry the car as quickly as possible. Wash with your arms and whole body, and not by hand, meaning wash in a wide range of motion. This way, you cover the entire panel efficiently.

Washing and drying your car quickly means you won’t have to stay long under the heat of the sun. However by doing this, make sure that you’re not compromising the quality of your DIY car wash.

If you’re washing your car on a hot day, do it quick and make sure to do it right or else you’re going to have to do it again.

In order to dry your car quickly and efficiently, invest in a leaf blower. You can also keep multiple microfiber towels in large sizes to help cover and dry as many areas as possible.

Now that you know how to wash your car under direct sunlight, grab your bucket and start cleaning. It’s possible to wash your car on a hot day with the right tools and method. All you need is a portable water deionizer, a leaf blower, and some microfiber towels.

First, you have to make sure that you’re wearing protective gear to protect you from the sun and the chemicals you’re going to use. Washing the wheels and tires first is a smart move so you can keep your paint free from dirt and mud splash.

A portable water deionizer helps in keeping water spots from forming on your car’s vehicle. A leafblower helps in drying your car quickly and efficiently. Both are great investments for cleaning your car!

Just follow these 6 easy steps and you’ll be cleaning your car on a hot day effectively in no time.

If you have no time or the energy to wash your car under the heat of the sun, we can do it for you!

We offer Superior Mobile Car Wash and Wax and Premium Mobile Car Wash and Wax services so you don’t have to clean your car on a hot day. Contact us to get a free quote now!

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