How To Clean Windows Between Truck Cab And Cap | Ultimate Guide

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Cleaning the windows between your truck cab and cap can be tedious and time-consuming, but it’s important. 

But how to clean windows between truck cab and cap?

You can use a water hose and spray between the truck’s cab and cap. If that doesn’t work, attach a sponge to a wooden stick and insert it into the gap to clean it. You can also use specially designed brushes for the job. Last but not least, you can detach the truck cap and clean the window in between as a last resort. 

In the following sections, we’ll show you how to effectively and efficiently clean the windows between your truck cab and cap. 

How to Clean Windows Between Truck Cab and Cap

Clean Windows Between Truck Cab And Cap
Source: Axle Addict

There are four methods to clean the window between the truck cap and cab. Some of these methods require special tools, while others can be done with what you already have. 

Now, we found this cleaning quite similar to cleaning behind the third brake light. As you don’t need to clean these parts often, you should also clean them while you’re at it.

Method One: Use a Water Hose

As the name suggests, you need to spray water down the gap between the truck cab and cap to clean it. 

Tools Needed:

All you need is a water hose and a lot of pressure. You can use a mini compressor if you do not have enough water pressure. 


The process is very simple. Use the water hose to spray down the narrow gap. You must ensure that there is enough water pressure. This method won’t work without a high amount of water pressure.

To increase the water pressure on your tap if you feel it is insufficient, try pressing and holding the head of the hose. This may effectively increase water pressure and allow more water to reach the gap.

As you continue to hold the hose down the gap, the dirt will begin to clear. Once you are satisfied with what you see, you can stop the process.

Using tap water for this process may leave water spots in your truck. So, it’s better to use deionized water. 

However, buying deionized water can be expensive every time you wash your truck. That’s why you can try making a DIY water deionizer at home.   

Method Two: A Stick with A Sponge

If the water did not work or you were not confident about it, you could always try inserting a stick with a sponge attached to its head.

Tools Needed:

A narrow stick, a sponge, and soapy water.


Get a narrow stick that can fit through the gap and attach a sponge on top of it. Make sure the sponge does not detach easily. 

Before you begin cleaning, soak the sponge in soapy water. Now, you can use various products instead of soapy water. But if you want, you can make a great DIY window cleaner at home. 

Then, insert the stick in the gap between the truck’s cab and the cap. With the stick, remove as much dirt as possible. 

The sponge can be extra helpful as you can reach the tough spots with it. When you are done, pour some water down the gap to rinse it.

You can repeat the whole process to clean the window better if some dirt is left.

Method Three: Specialized Tools

The last two processes involve some do-it-yourself procedures. If you are not a DIY enthusiast, you can get some tools to help you get the job done.

Tools You Can Use:

Here are some products that have been specially designed to help you clean the tough spots.

Tool NameFeaturesPrice
DocaPole Cleaning KitDocaPole Cleaning Kit with 7-30 FootUltimate high-reach, microfiber duster and squeegees  
Ettore Mighty Window WasherEttore, Size, 50010 Mighty Window WasherRemovable microfiber sleeve, ergonomic handle for better grip
Windex Window Cleaner PadsZiploc Gallon Food Storage BagsAmmonia-free, fast cleaner
Invisible GlassInvisible Glass 95160 2-Piece Quick Change Reach and Clean ToolRemovable, reversible and reusable
Chemical Glass Wash MittChemical Guys MIC498 Chenille Premium Scratch-Free Microfiber Wash MittScratch-free, extra plush

With any of these tools, you can clean the window between your truck cab and cap very easily. You will only need a dowel rod to use along with the Windex window cleaner pads.


Follow the procedure mentioned in method two. 

Method Four: Detach Your Truck Cap

If none of the above methods satisfy you, this ultimate method involves removing your truck’s cap.


Here is the step-by-step procedure for removing your truck’s cap. 

  1. Disconnect all the wire harnesses for brake lights. 
  2. Now, you will have to remove all the clamps. There should be about four to six clamps based on the model and make of your car.
  3. After you get all the clamps undone, apply a little pressure to detach the truck’s cap. The cap should now be detached but resting on the edge of the bed.

Also, here is a video of the whole process that may be helpful.

Cleaning the windows on both sides is very easy now that you have detached the truck’s cap from the bed. Truck caps can weigh up to 200 pounds. So, you cannot do this alone. You need three more people to hold each corner of the truck cap.

Are you wondering how to reattach your truck’s cab after cleaning the windows? It’s very simple; you can do it in your garage, so don’t worry. 

Frequently Asked Questions (FAQs):

How often should I clean the windows between my truck cab and cap?

It’s a good idea to clean the windows between your truck cab and cap at least once a month or more frequently if you drive in dirty or dusty conditions. Keeping your windows clean will help improve visibility while driving and keep your truck looking its best.

Is it okay to use a power washer to clean the windows between my truck cab and cap?

Power washers are effective for cleaning the exterior of your truck, but they shouldn’t be used on the windows between the cab and cap. High-pressure water can damage windows and cause them to leak, and the spray can be difficult to control, leading to overspray and accidental damage to the cab and cap.

Does homemade window cleaner work on truck cab-cap windows?

You can use a homemade window cleaner to clean the windows between your truck’s cab and cap. In a spray bottle, combine equal parts water and vinegar, then add a few drops of dish soap. Shake the mixture well, spray it onto the windows, and wipe them clean with a microfiber cloth.

Can I use any type of window cleaner on these windows?

Most window cleaners are safe to use on the windows between the cab and the cap of your truck. However, it is always a good idea to test a small, inconspicuous area first to ensure that the cleaner does not cause any damage or discoloration. Avoid using abrasive cleaners or scouring pads, as these can scratch or damage the windows.


Knowing how to clean the windows between your truck cab and cap is essential for maintaining good visibility while driving and keeping your truck looking its best. 

You can easily clean these hard-to-reach windows with the right tools and a little elbow grease.

Regular cleaning will also help prolong your windows’ lives and keep them in top condition. Next time you’re getting ready to hit the road, clean the windows between your truck cab and cap, and you’ll be well on your way to a safer and more enjoyable drive.

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I am a professional automotive and car mechanic. I have been in the industry for 15+ years. At the moment I have 3 garages. Every day dozens of cars come to our repair shops that are damaged in a very short period of time. The main reason for this is not taking a proper care of the car.

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