Cleaning your Britax car seat is a necessity to elongate its longevity. It is also crucial to clean your car seat because of the health benefits it brings. Besides, you don’t want any of that foul-smelling ammonia-like stench inside the car. However, cleaning requires time and being familiar with how to do it the right way, so let’s teach you.

To clean a Britax car seat, you have to focus on the different parts. First, you take off the cover and wash it; then, you must clean the harness and the buckles with mild soap and water. You have to allow your car seat to air-dry.

Are you aware that you can’t soak the harness in water or even use a lubricant based cleaner on the buckle? Cleaning your Britax car seat is super easy, but you need to know what you are doing. Read and learn in this article how to clean your Britax car seat.

How To Clean Britax Car Seat

To clean your Britax car seat, you have to wash it with mild soap and water. We have put together a detailed sequence of steps, so the cleaning procedure is easier to understand. Here are the steps;

Cleaning The Car Seat Cover

  • Read the manufacturer’s manual to learn how to take off the car seat’s cover.
  • Vacuum the car seat to suck off food crumbs and dirt stuck in the crevices. You will observe stuff like cereals and other food items you had fed your child with during the week. You will also realize that some dirt is unidentifiable.
  • Turn over the seat and vigorously shake it for crumbs the vacuum could not remove. 
  • If you choose to hand wash the covers, use mild soap and water, but the Britax seat cover can be machine-washed. Confirm from your user’s manual if you can iron the covers.
  • Dry the cover flat to prevent shrinkage.
  • Reinstall the car seat cover after you have dried it.
  • This cleaning procedure works adequately for the weekly, monthly, or emergency cleaning routine.

Cleaning The Car Seat Buckle

  • Read the manufacturer’s manual to learn how to take off the car seat’s buckle.
  • Using running water, rinse-off the car seat buckle. 
  • It is not ideal to drench a Britax car seat buckle with any form of soap or lubricant. It is because the chemical compounds from these products can reduce the efficiency of this vital piece.
  • Confirm that the buckles are entirely functional. Buckle and unbuckle while making sure it clasps and clicks. You should clean it thoroughly if it doesn’t lock.
  • Wipe the buckle dry and reinstall.

The Car Seat Safety Straps

  • Spot wipe the safety straps using water and soap. 
  • It is not ideal to completely dip the safety harness into the water or use harsh products like bleach. It is because they distort the product fiber.
  • You can not bleach, iron, or wash it using a machine.
  • Safety straps are essential, so you need to be careful not to destroy them. Find out how to clean car seat straps
  • In case it is destroyed, contact your manufacturer for part replacement. 

Cleaning Other Parts

You can clean the armrest, cup holder, or other detachable attachment also. Wipe down or wash in a machine. Confirm from the manufacturer manual to be sure about the cleaning process.

After cleaning, check that your child fits snugly into their seat. Adjust or take out insert pads is necessary. 


For permanent damages, you can get parts from the manufacturer’s website. To prevent permanent damages, the Britax manufacturers offer waterproof liners. The liners protect the seats from spills and other unexpected messes.

How Do I Clean My Britax Marathon Car Seat?

Take out the car seat from the car

Then take apart the accessories and car seat parts to prepare them for the cleaning process.

  • First, take out the shoulder harness.
  • You have to remove the pad insert from the head and back region of your Britax marathon. It is held in place by elastic bands. Discard any debris found in or around it.
  • Next, remove the car seat covering; clips hold it down. Take out the pins and remove the seat covers.
  • Now take out the crotch belt; it has metal that holds it and stops it from sliding.
  • Check your manual to confirm how to remove parts that seem confusing to take out. 
  • After taking out all the straps, the cover can easily slide off.
  • Take out the seat butt pad.


The manufacturers permit the coverings to be machine-washed. Set to delicate and cold wash. It’s not ideal to use bleach or bleach products.

However, you can not wash buckles or straps using a machine. Use soapy water to clean the plastic casing of the seat. Wring out excess water from all the items you have washed and hang them out to dry.

Cleaning Your Britax Marathon Harness And Buckles

Spot clean the harness with water; only use soap if it is vital. Rinse out the buckle with water; you can use Q-tips to reach spots that are difficult to clean.

Assemble Your Britax Marathon

Similar to how you took apart the seat, you have to piece back everything.

  • First, put the butt pad and the crotch strap in the correct position.
  • Next, put the seat body over both the butt pad and the crotch strap.
  • Go ahead and latch the crotch strap and then put the seat covering.
  • Secure the seat covering with its elastic bands.
  • Set into place the body of the seat with its latch and adjust it
  • You have to put back the shoulder straps and set them to fit your child snugly. It should not turn or look bulged; instead, it is ideal it is flat.
  • Confirm every piece is together and placed adequately
  • Put baby in her Britax marathon seat and adjust any parts that do not seem adequately placed.

How Do I Clean A Britax B Agile Double Stroller?

  1. Read your manufacturer manual; you will observe instructions on seat covering, storage, and canopy.
  2. Empty the storage and further remove accessories.
  3. Vacuum the seat to remove grime and dirt. You would uncover dirt like leftover food particles. 
  4. You should clean the stroller frame.  Also, check for dents and rust—oil your stroller’s joints and bolts for easy movement.
  5. Test the brakes, guarantee it locks and unlock as it should. Clean and oil the brakes thoroughly. 
  6. Wash the entire stroller with mild soapy water and a sponge. Prioritize your cleaning on the seat and canopy, wash off accumulated dust and debris.
  7. Check the wheel and clean them. Please make sure all the tires are working as they should. Push and pull it to be sure it aligns properly.
  8. Please note, do not use harsh cleaners or bleach while cleaning as they can destroy your stroller. 
  9. Finally, Wipe the stroller with a clean damp cloth. Air dry your agile double stroller.
  10. When not in use, store your stroller in a dry place after cleaning. If used in the snow or rain, wipe down thoroughly to remove all moisture. Moisture or wetness allows the growth of molds and even rust. 
  11. Regular cleaning is essential to keep your seat looking fresh and new. It is also to keep your baby safe from germs. Proper handling of your stroller is also crucial; please consult your stroller’s manual.

How To Clean Britax One4Life 


We have discussed how to clean different Britax baby products. The products have similar cleaning procedures but differ by manufacturer’s design.

We have further learned that frequently cleaning your car seat keeps your baby safe from germs. Consult your manual before using any cleaning product.

While maintaining your Britax car seat’s cleanliness, don’t forget to explore other essential car care tips such as minimizing hail damage’s impact on your car’s value, and getting familiar with the cost of heated seat repairs.


Welcome to my car seat blog! As a mom of 3, I put together with other hard-working moms a highly informative one-stop car seat resource, full with many reviews and buyer guides. I hope you find it invaluable. Thank you for trusting me & my team! - Keren

Keren Simanova

Welcome to my car seat blog! As a mom of 3, I put together with other hard-working moms a highly informative one-stop car seat resource, full with many reviews and buyer guides. I hope you find it invaluable. Thank you for trusting me & my team! - Keren