How To Wash A King Size Mattress Topper?

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“How to wash a king size mattress topper” is a question we all face when we decide to invest in this pinnacle of bedtime luxury.

Considering that a mattress topper significantly enhances our sleep comfort, it becomes even more crucial to maintain its cleanliness to prolong its lifespan and keep it as good as new.

The magnificent king size dimension offers unparallelled cosiness, but the size also adds a layer of complexity when it comes to cleaning.

Did you know that a clean mattress topper can significantly improve your sleep quality? It’s not just about comfort – it’s also about health and hygiene. As they say, a clean bed leads to a clear head!

Did you know? That egg crate mattress toppers has the best cooling properties making them perfect for hot sleepers!

This article will cover:

  • Understanding different kinds of mattress toppers and their specific cleaning instructions.
  • The importance of checking the care label before attempting to clean your topper.
  • Detailed steps on vacuuming, spot cleaning, machine washing, and hand washing your mattress topper.
  • Tips on speeding up the drying process and potential risks of drying in a dryer.

Sit tight, because we’re diving deep into the world of mattress topper maintenance!

First Things First: Always Check The Care Instructions

The first rule of thumb before embarking on the cleaning process: always check the manufacturer’s guidelines.

This is critical, as different toppers require different care. 

Disregarding these instructions could lead to damaging your topper or voiding any warranties.


For a more comprehensive discussion on understanding mattress topper care instructions, check out this helpful guide.

A hand pressing down on a mattress topper

What You’ll Need

  • A vacuum cleaner with a soft brush attachment
  • A mild detergent or down cleaner
  • Cold water
  • A large bowl (for spot cleaning)
  • Soft cloths (for spot cleaning)

The Cleaning Process

With care instructions in mind, let’s proceed to the cleaning process. Remember, we’re aiming for a refresh, not a topper tragedy. Keep it gentle and patient.

Vacuum the Topper

First, use a vacuum with a soft brush attachment to gently remove any dust or debris from the topper. 

This will ensure that you aren’t grinding any dirt into the material during the washing process.

A pair of hands placing a mattress topper on top of a mattress

Pre-Treat Stains

Notice any unsightly stains marring your topper? Pre-treat them with a down cleaner or mild detergent. Allow the detergent to work its magic on the stain for about 15-20 minutes before proceeding to wash the entire topper. Need more details on stain removal? Explore this useful article.

Time to Wash

Option 1: Machine Wash (If Permitted)

If the care instructions permit machine washing, set your machine to a cold, gentle cycle. Use a small amount of down cleaner or mild detergent. Don’t just dunk your detergent onto the topper—add it to the water. For additional guidance on machine washing toppers, check this handy post.

Rinse the topper twice to ensure all cleaner is removed. When it comes to drying, opt for a low-heat or no-heat cycle on your dryer, occasionally flipping the topper for even drying.

Note: If your washing machine isn’t large enough to accommodate the king size topper, or if machine washing isn’t permitted, you’ll need to spot clean your mattress topper.

Option 2: Hand Wash (If Machine Washing Not Permitted)

Hand washing can be a delicate and therapeutic experience. To begin, prepare a solution of mild liquid laundry detergent diluted with water. Detergent quality is crucial here—low-quality or powdered detergents could affect the texture of the fabric cover or cause discoloration.

Apply the cleaning solution to the stains using a soft cloth and gentle, circular motions. Allow the solution to rest on the stains for 30 minutes, then use a damp cloth to wipe off the solution. Leave the topper to air dry on a flat surface, flipping occasionally. For more hand washing tips, explore this detailed guide.

Avoid Bleach and Whiteners

If you’re cleaning a bamboo mattress topper, ensure that your detergent doesn’t contain bleach or whiteners. Both these chemicals could damage the fabric.

Do Not Use a Dryer

Though it might seem convenient, never put your mattress topper in the dryer. This could cause irreparable harm to your topper. Instead, let the air do its job and dry your topper naturally on a flat surface.

Air-Drying Your King Size Mattress Topper: How Long Does It Take?

Air-drying is the recommended method to dry most mattress toppers, but it might leave you wondering about the time it takes.

Unfortunately, there isn’t a one-size-fits-all answer. The drying time for a king size mattress topper can vary significantly depending on factors like humidity, air circulation, and the type of topper.

Down Mattress Toppers

If you own a down mattress topper, it may take 24-48 hours to air dry.

Remember to fluff the topper occasionally during the drying process to ensure the filling dries evenly.

A hand touching a mattress topper

Memory Foam Mattress Toppers

A memory foam mattress topper may take anywhere between 10 to 24 hours to dry, depending on its thickness. Remember, direct heat can damage memory foam, so air drying in a cool, well-ventilated area is recommended.

Wool Mattress Toppers

Wool mattress toppers require a bit more patience. They can take longer to dry than other types – best to leave them out to air dry for a full day, if not more. However, the extra time is worth it to maintain the comfort and durability of your wool topper.

Latex Mattress Toppers

Latex mattress toppers, similar to their wool counterparts, can take up to 48 hours to air dry completely. Latex is a dense material, and ensuring it’s thoroughly dry is crucial to avoid the growth of mildew.

Understanding The Cleaning Frequency Of Your King Size Mattress Topper

Your luxurious king size mattress topper needs to be cared for adequately to ensure its longevity. One of the essential aspects of this care is understanding how often it should be cleaned.

The General Rule of Thumb

Generally, you should clean your mattress topper every three months. However, this timeline isn’t fixed and can change based on a few factors.

Factors Influencing Cleaning Frequency

  1. Level of Dirt: If your mattress topper tends to get dirty quickly, you might need to clean it more often.

  2. Night-time Habits: If you tend to overheat at night, causing excessive sweating, frequent cleaning will be necessary.

  3. Pet or Kid Factor: If you have pets or kids who frequently join you in bed, this can increase the amount of dirt and therefore require more frequent cleaning.
A pair of hands tucking in a mattress topper

The Importance of Spot Cleaning

Spot cleaning any stains as soon as they occur can not only keep your topper looking pristine but also minimise the frequency of complete washing. This can help preserve the structure and integrity of your mattress topper. Read more about spot cleaning techniques here.

Always Check the Care Label

Before deciding on how to wash your mattress topper, always make sure to check the care label for specific instructions. If you’re unsure about machine washing your topper, hand washing is always a safe bet. This guide can help you further understand the different ways to wash your mattress topper.

By properly maintaining your king size mattress topper and keeping it clean, you can extend its life and ensure it continues to provide you with comfortable and restful nights. Remember, a clean mattress topper is a happy mattress topper!

Recognising The Signs: When Your King Size Mattress Topper Needs Cleaning Sooner

Every topper has its own personality. And just as people need different levels of care, so too do our mattress toppers.

Although the general guideline is to clean your mattress topper every three months, there are a few signs indicating that your topper may need a little extra TLC sooner.


Stains are a dead giveaway. If you notice any discoloration or blotches on your mattress topper, it’s a clear signal that it needs a clean.

Spot clean these offending marks as soon as they appear to avoid them setting in.

Learn more about effective stain removal methods

A mattress topper on top of a mattress


A fresh smelling mattress topper can enhance your sleep quality. However, if your topper starts to give off an unpleasant aroma, it’s time for a clean. A simple yet effective way to neutralise odours is by sprinkling baking soda over the entire surface of the topper and vacuuming it after about 30 minutes.

Allergy Triggers

Allergies can be a nightmare, literally and metaphorically. If you or someone in your household starts experiencing allergic reactions, it may be a sign that your topper needs a clean. Allergens such as dust mites and pet dander can accumulate on your topper, triggering these symptoms.

The Pet and Kid Factor

Our little companions, whether furry or human, can accelerate the need for a clean. Pets tend to shed hair and dander, while kids may spill food and drinks on the topper. It’s a good idea to clean your topper more frequently if you’re sharing your bed with these adorable beings.

Night-Time Overheating

If you tend to overheat at night, you might find yourself cleaning your mattress topper more often. Sweat and body oils can accumulate on the topper, reducing its comfort levels.

Drying Your King Size Mattress Topper: Can It Be Done In A Dryer?

One of the common questions about king size mattress topper maintenance is whether it can be dried in a dryer.

The answer isn’t a simple yes or no. It depends on the type of topper you have and the care instructions provided by the manufacturer. Let’s delve a bit deeper into this.

Understanding Your Mattress Topper

There’s a variety of mattress toppers available, and they can’t all be cared for in the same way.

Some mattress toppers can tolerate a tumble in the dryer on a low heat setting. But others, such as foam toppers, are heat-sensitive and should never meet your dryer’s interior.

washing machine and dryer

When in Doubt, Air Dry

If the care label doesn’t provide clear instructions on whether the topper can be dried in a dryer, play it safe and avoid it. Instead, air dry your topper on a flat surface. It may take a bit longer, but it’s a sure way to prevent potential damage to your topper. To better understand the process of air drying a mattress topper, explore this insightful guide.

The Potential Risks Of Drying Your King Size Mattress Topper In A Dryer

When it comes to drying your king size mattress topper, using a dryer might seem like the most convenient option.

But before you toss your topper into the tumble dryer, consider the potential risks involved.

Foam Topper Damage

Foam mattress toppers are particularly sensitive to heat. Drying them in a machine can cause the foam to melt or break down, significantly affecting their structural integrity and comfort levels.

A hand pressing down on a mattress

Shrinkage of Wool Toppers

If you have a wool mattress topper, using a dryer can lead to shrinkage. Wool fibres react to heat and agitation by tightening and shrinking, which can diminish your topper’s size and fluffiness.

Risk of Mold and Mildew

Using your mattress topper before it’s completely dry could result in mold and mildew growth. These unwelcome guests can not only ruin your topper but also cause health problems. It’s advisable to leave the topper out for a full day to ensure it’s thoroughly dry before returning it to your bed.

Potential Topper Damage

The vigorous movement and heat within a dryer can cause wear and tear on your mattress topper, affecting its lifespan. Always heed the manufacturer’s care instructions to stay on the safe side.

To bypass these risks, the safest method is to air dry your mattress topper on a flat surface or outside in a dry, shaded area. If a dryer is your only option, use a low heat and tumble setting, but always make sure to check the care label first.

Taking proper care of your mattress topper extends its lifespan and maintains its comfort. For more on how to keep your topper in tip-top shape, take a look at our in-depth guide on caring for your mattress topper.

Speeding Up The Drying Process For Your King Size Mattress Topper

Need your king size mattress topper to dry faster? While patience is generally recommended, there are indeed a few methods to expedite the process. Let’s explore them.

Increase Airflow

Boosting the circulation of air around your mattress topper can help it dry faster. Open your windows, turn on a fan, or increase the room’s temperature if it’s chilly.

Use a Dehumidifier

Using a dehumidifier can be incredibly beneficial, especially in humid conditions. It helps by removing excess moisture from the air, thus speeding up the drying process.

Elevate the Topper

Bed risers or a similar setup that elevates your mattress topper can increase airflow around and underneath it, further helping to speed up the drying process.

Morning Sunlight Exposure

A touch of direct sunlight can do wonders. You can expose your mattress topper to direct sunlight for about 30 to 40 minutes during the early morning hours. This allows the sun’s heat to absorb excess moisture and also helps to eliminate odours.

However, remember to avoid direct sunlight during peak hours (noon and afternoon), as the high heat may damage the structure of materials like memory foam.

Drying A King Size Mattress Topper In Cold Weather: What You Need To Know

While air-drying your king size mattress topper outdoors seems like a practical idea, doing so in cold weather may not be the best choice. Why? Let’s delve into it.

Foam Toppers and Cold Weather

Foam toppers, in particular, are sensitive to extreme temperatures. In fact, they can melt if exposed to direct sunlight or high heat. Ironically, such high heat can occur even in cold weather due to the magnifying effect of sunlight on ice or snow. Thus, it’s best to keep foam toppers away from cold outdoor conditions.

Drying Time and Mould Growth

Another challenge with drying your topper outside in cold weather is the increased drying time. Cold weather generally means more humidity and less evaporation, which results in your topper taking longer to dry. This prolonged dampness could, unfortunately, lead to mould and mildew growth, damaging your topper and potentially affecting your health.

Best Practices for Drying a Mattress Topper

So, what’s the solution? It’s simple. Air dry your mattress topper in a well-ventilated room or somewhere outside in a dry, shaded area. This ensures the topper is not exposed to any extremes of temperature that might damage it.

If circumstances force you to dry it outside in cold weather, be sure to keep it out of direct sunlight and check it frequently to ensure it’s not taking on additional moisture.

Danger Description
Damage to foam toppers Heat sensitivity can cause the foam to melt
Shrinkage Wool mattress toppers can shrink in a dryer
Mold and mildew growth Using the topper before it's completely dry can lead to mold and mildew
Damage to the topper Dryer can cause physical damage to some mattress toppers


How often should I wash my king size mattress topper?

As a general rule, it’s best to wash your king size mattress topper every three months. However, this can vary depending on factors like personal cleanliness, whether you overheat at night, or if you have pets or kids in bed.

Can I dry my king size mattress topper in the dryer?

Whether you can dry your topper in a dryer largely depends on its material. Some toppers can handle low heat settings, while others, particularly foam ones, may degrade. Always refer to the manufacturer’s care instructions.

What signs indicate my mattress topper needs cleaning before the three-month mark?

Signs include visible stains, unpleasant odours, and increased allergies. Also, if you have kids or pets who often share your bed, you might need to clean your topper more frequently due to spills or pet dander.

What’s the best way to speed up the drying time of a king size mattress topper?

Increasing airflow, using a dehumidifier, elevating the topper, and exposing it to mild sunlight can all help speed up drying. However, remember to keep it out of direct sunlight during noon and afternoon.

Can I air-dry my mattress topper outside in cold weather?

Although it’s possible, it’s not recommended due to increased drying time and risk of damage, particularly for foam toppers. Instead, choose a well-ventilated room or a dry, shaded outdoor area.


Maintaining the cleanliness of your king size mattress topper doesn’t have to be a daunting task. With regular checks and careful cleaning, you can extend the lifespan of your topper, providing countless nights of comfortable sleep.

  • We covered how often a topper should be washed and the signs that indicate it needs a clean sooner.
  • Discussed the possibility of drying a topper in a dryer and the potential risks associated.
  • Provided tips to speed up the drying time and the estimated drying time based on the type of topper.
  • We advised against drying a topper outside in cold weather and provided an array of frequently asked questions to address common concerns.

Looking for more information about king size mattress toppers? Check out our articles about what a mattress topper does, how to stop your mattress topper from sliding, or what size is a king size mattress topper. Also, have a look at these external resources about how to clean a mattress topper safely and can you wash a mattress topper.

Understanding your topper can go a long way in preserving its longevity and your comfort, making every night a good night’s sleep.

– Article by Lewis Hugh

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