Does a hot wash kill dust mites?

Yes. Washing at 55 to 60 degrees Celsius kills house dust mites reliably. Lower temperatures (30 to 40 degrees) reduce allergen load but do not kill mites. For bedding and towels where mite control is the priority, 60 degrees Celsius is the recommended temperature. For eczema-specific clothing made from bamboo or organic cotton, use the lower temperature that the fabric tolerates and apply alternative mite control strategies.

Can I hot-wash bamboo eczema pyjamas to kill dust mites?

No. Hot washing at 60 degrees Celsius damages bamboo fibre structure, reducing the softness, moisture-wicking, and thermoregulating properties that make bamboo effective for eczema skin. The damage is cumulative and irreversible over repeated washes. Wash bamboo eczema pyjamas at 30 to 40 degrees Celsius per the care label, and manage dust mite exposure through bedding and pillow encasements that can be hot-washed.

What temperature kills dust mites in washing?

55 to 60 degrees Celsius. This is the threshold consistently supported by allergy research and recommended by the Australasian Society of Clinical Immunology and Allergy for bedding and towels in dust-mite-sensitive households. Items washed below this temperature may have their allergen load reduced but retain live mites.

Can I use a lower-temperature wash with a eucalyptus detergent instead?

Eucalyptus-based laundry products can reduce dust mite allergen levels in cooler washes and are useful for delicate eczema clothing that cannot tolerate 60 degrees. They are not equivalent to a 60-degree wash for mite elimination on items that can tolerate high heat. Use 60 degrees for bedding and towels (where the fabric allows), and consider a eucalyptus additive for eczema clothing washes as a complementary approach.

How often should I wash bedding at 60 degrees if my child has eczema?

Weekly is the standard recommendation for eczema households where dust mite sensitivity is confirmed or suspected. Pillowcases should be washed at least weekly and more frequently during flares or in humid months when mite populations are higher. Duvets and mattress encasements can be washed monthly or per the manufacturer's guidance.

Do Hot Washes Help With Eczema? What the Research Says

By Kelly Northey, Certified Postpartum Nutrition Professional

Founder of Nella Vosk • 14+ years supporting families across motherhood, feeding, and early childhood wellbeing

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This article is part of the Nella Vosk Complete Guide to Eczema-Friendly Clothing: Fabrics, Fit & Science for Australian Families, the comprehensive resource for clothing and environmental choices that support eczema-prone skin. This article answers a specific question in the eczema laundry cluster: does washing at high temperature help eczema, and if so, which items should be hot-washed and which should not?

The idea that hotter water cleans better is intuitively appealing. For eczema families managing dust mites, bacteria, and persistent irritants in fabric, a hot wash can feel like the most thorough solution. The reality is more specific: hot washing is genuinely beneficial for certain items, actively harmful for others, and the difference between the two categories matters a great deal for anyone using eczema-friendly sleepwear.

This guide gives a clear, evidence-based answer to the hot-wash question: what the research says about temperature and dust mite elimination, which household items should be washed at 60 degrees Celsius, which should never be hot-washed, and what to do when the items you most need to hot-wash are the ones most damaged by it.

What the Research Says: Hot Water and Dust Mite Elimination

The strongest evidence for hot washing in eczema management relates specifically to dust mite control. Dust mites are a confirmed and significant eczema trigger, with research consistently finding that a meaningful proportion of children with atopic dermatitis are sensitised to house dust mite allergens. The mites themselves and their faecal particles are potent allergens that penetrate the compromised skin barrier in eczema and drive immune responses.

The critical temperature finding: research published in allergy and immunology literature confirms that washing fabric at 55 to 60 degrees Celsius kills house dust mites effectively. Temperatures below this threshold do not reliably eliminate live mites from fabric, even with long wash cycles. Cold and warm washing (30 to 40 degrees Celsius) reduces the mite allergen load in fabric but does not kill the mites themselves, meaning they can recolonise the fabric as it dries.

This is why bedding, pillowcases, and towels, which have the highest mite burden due to prolonged body contact in warm conditions, are routinely recommended to be washed at 60 degrees Celsius weekly for eczema-affected households. The Australasian Society of Clinical Immunology and Allergy (ASCIA) and international eczema guidelines consistently include this recommendation.

What about detergents that claim to kill dust mites at lower temperatures?

Several laundry products marketed to eczema and allergy families, including some eucalyptus-based formulations, claim to eliminate dust mite allergens at cooler temperatures. There is some evidence that certain essential oil compounds can reduce mite allergen levels at lower temperatures, and these products have a legitimate role for fabrics that cannot tolerate 60 degrees Celsius. However, these products reduce allergen load rather than killing live mites, and the evidence base is less robust than the 60-degree temperature threshold. They are a useful alternative for delicate fabrics, not a complete substitute for hot washing where hot washing is safe to use.

What to Wash at 60 Degrees Celsius

The items that should be regularly washed at 60 degrees Celsius are those with high dust mite burden and the ability to tolerate high-temperature washing without damage:

Bedding and pillowcases

Cotton and polyester bedding, duvets, and pillowcases can generally tolerate 60-degree washing. Bedding should be washed at this temperature weekly for eczema households where dust mite sensitivity has been identified or suspected. Pillowcases should be changed and washed even more frequently if the person with eczema sweats significantly at night, as sweat and skin cell accumulation accelerates mite colonisation.

Check the care label before proceeding: some filled duvets and pillows require dry cleaning or specialist laundering rather than machine washing at high temperature. Where the duvet or pillow itself cannot be hot-washed, a dust-mite-proof cover that can be hot-washed weekly is the practical solution.

Cotton towels

Towels used by the eczema-affected person should be washed at 60 degrees Celsius weekly, or more frequently during flares. Towels are used on post-bath damp skin, which is the period of highest emollient absorption and also the period when residues in fabric are most likely to be absorbed through an already-opened skin barrier. A hot wash removes both mite allergens and accumulated bacteria more effectively than lower temperatures.

Cotton clothing that tolerates high heat

Standard cotton underwear, socks, and t-shirts that are not made from eczema-specific bamboo blends or organic cotton can typically be washed at 60 degrees Celsius. Check garment care labels. For eczema families where clothing irritation is not fabric-based (i.e., cotton standard garments are well tolerated), hot washing these items is reasonable.

Mattress and pillow covers

Dust-mite-proof encasements and mattress protectors designed for allergy management should be washed at 60 degrees Celsius according to the manufacturer’s instructions. These covers are typically made from polyester or tightly woven cotton-polyester blends that tolerate high heat. Washing them at lower temperatures reduces their effectiveness.

For the full picture on dust mite management in eczema, including encasements, flooring, and bedroom environment strategies, see could dust mite allergy be at the root of your eczema symptoms? and the companion guide on how mattress and pillow protectors help with eczema.

What NOT to Wash at High Temperature

The items that should never be washed at 60 degrees Celsius are precisely the items most likely to be worn against eczema-prone skin for the longest periods: bamboo sleepwear, bamboo-cotton eczema pyjamas, scratch sleeves, and similarly constructed eczema-specific clothing.

Why hot water damages bamboo and bamboo-cotton fabrics

Bamboo viscose (bamboo jersey) is processed into fabric through a method that produces fine, smooth fibres with exceptional moisture-wicking and temperature-regulating properties. These properties are what make bamboo effective for eczema skin: the smooth fibre surface reduces friction on inflamed skin; the moisture-wicking draws sweat away before it can sit on the skin and trigger a flare; the thermoregulating quality prevents the overheating that drives nighttime itch.

Hot water breaks down bamboo fibre structure at the molecular level. The effects are cumulative and irreversible:

Fibres stiffen and lose their characteristic softness, increasing friction against skin
Moisture-wicking performance degrades as fibre capillary structure changes
Thermoregulating properties reduce as the fibre density alters
Fabric pills and thins faster, shortening garment lifespan significantly
Elasticity in cuffs and waistbands deteriorates more rapidly

A bamboo eczema pyjama set that has been hot-washed repeatedly is not providing the same skin environment as a correctly cared-for set. Families sometimes find that eczema clothing that worked well initially seems to stop working after several months, and hot washing is frequently the cause.

Organic cotton eczema clothing

Organic cotton clothing designed for eczema-prone skin is also best washed at 30 to 40 degrees Celsius. Unlike standard cotton, GOTS-certified organic cotton is processed without harsh chemical treatments, and its softer, less structured fibre behaves more like bamboo in terms of heat sensitivity. Check the care label, but the general principle for eczema-specific clothing is: warm water, not hot.

Scratch sleeves and eczema mittens

Scratch sleeves made from bamboo-cotton blend require the same cool to warm washing temperature as eczema pyjamas. The tight-fit construction that makes them stay on through the night relies on elasticity that degrades under repeated hot washing. A sleeve that no longer sits snugly at the shoulder is one that a baby will remove in the night.

The Problem: The Items You Most Want to Hot-Wash Are the Ones Most Damaged by It

This is the core challenge of the hot-wash question for eczema families. The items worn directly against eczema skin for eight or more hours overnight are the items where dust mite control matters most. And these are precisely the items, bamboo pyjamas, organic cotton sleepwear, scratch sleeves, that cannot tolerate 60-degree washing.

The resolution is a two-category approach: hot wash the items that can tolerate it and that carry the highest mite burden (bedding, towels, cotton covers), and use alternative strategies for the delicate eczema clothing that cannot be hot-washed.

Alternative strategies for eczema clothing that cannot be hot-washed

Washing at the highest temperature the fabric tolerates: some eczema pyjama labels allow 40 degrees Celsius rather than the standard 30. At 40 degrees with the right washing powder and eczema-safe detergent, allergen load is meaningfully reduced even without achieving full mite kill.
Tumble drying on medium heat: if the fabric allows it, tumble drying after a cool wash raises the temperature sufficiently during drying to kill mites that survive the wash cycle. Check labels carefully, as bamboo typically requires low-heat drying.
Freezing: placing items in a plastic bag and freezing for 24 hours kills dust mites without any heat. Mites cannot survive freezing temperatures. Freezing does not remove allergen particles from the fabric (they must be washed out), but it eliminates live mites. This is particularly useful for items that cannot be washed at all, such as soft toys.
Eucalyptus-based laundry additives at cool temperatures: as discussed above, these products reduce mite allergen load in cool washes and have a role for delicate eczema clothing when used as part of a consistent routine.
Dust mite encasements on the mattress and pillows: reducing the mite burden in the sleep environment overall means that the eczema clothing, even washed cool, encounters lower allergen levels during use.

The Eczema Laundry Temperature Guide

Wash at 60 degrees Celsius

Cotton and polyester bed sheets and pillowcases: weekly
Cotton and polyester towels: weekly, more during flares
Dust mite mattress and pillow encasements: monthly or per manufacturer instruction
Standard cotton underwear, socks, t-shirts that tolerate high heat: as needed

Wash at 30 to 40 degrees Celsius

Bamboo eczema pyjamas and sleepwear
Bamboo-cotton scratch sleeves and eczema mittens
GOTS organic cotton eczema clothing
All eczema-specific clothing: check label, use the lower end of the acceptable range

Do not machine wash at any heat

Foam mattresses: spot clean only
Some filled duvets and pillows: dry clean or specialist laundry as per care label
Soft toys: freeze for 24 hours to kill mites, then surface wash or hand wash cool

Regardless of temperature: always use your established eczema-safe detergent, use half the recommended dose, and run an extra rinse cycle. The correct washing powder and eczema routine applies at every temperature.

For the complete eczema laundry technique guide, including detergent selection, dose, and rinse cycle practice, see how to wash clothes for eczema: step-by-step guide. For the full list of laundry mistakes that quietly worsen eczema regardless of temperature, see laundry mistakes every eczema parent makes.

Which Bamboo Clothing Eczema Products Should You Try First?

Frequently Asked Questions

: Yes. Washing at 55 to 60 degrees Celsius kills house dust mites reliably. Lower temperatures (30 to 40 degrees) reduce allergen load but do not kill mites. For bedding and towels where mite control is the priority, 60 degrees Celsius is the recommended temperature.

For eczema-specific clothing made from bamboo or organic cotton, use the lower temperature that the fabric tolerates and apply alternative mite control strategies.
: No. Hot washing at 60 degrees Celsius damages bamboo fibre structure, reducing the softness, moisture-wicking, and thermoregulating properties that make bamboo effective for eczema skin. The damage is cumulative and irreversible over repeated washes.

Wash bamboo eczema pyjamas at 30 to 40 degrees Celsius per the care label, and manage dust mite exposure through bedding and pillow encasements that can be hot-washed.
: 55 to 60 degrees Celsius. This is the threshold consistently supported by allergy research and recommended by the Australasian Society of Clinical Immunology and Allergy for bedding and towels in dust-mite-sensitive households.

Items washed below this temperature may have their allergen load reduced but retain live mites.
: Eucalyptus-based laundry products can reduce dust mite allergen levels in cooler washes and are useful for delicate eczema clothing that cannot tolerate 60 degrees. They are not equivalent to a 60-degree wash for mite elimination on items that can tolerate high heat.

Use 60 degrees for bedding and towels (where the fabric allows), and consider a eucalyptus additive for eczema clothing washes as a complementary approach.
: Weekly is the standard recommendation for eczema households where dust mite sensitivity is confirmed or suspected. Pillowcases should be washed at least weekly and more frequently during flares or in humid months when mite populations are higher.

Duvets and mattress encasements can be washed monthly or per the manufacturer’s guidance.

Next Steps:

The hot-wash answer for eczema is specific rather than universal: hot wash for bedding, towels, and encasements; cool to warm for eczema clothing. Getting this right protects both the dust mite control and the integrity of the clothing that delivers most of the benefit.

Return to the complete guide to eczema-friendly clothing for the full framework covering fabric, fit, and environmental choices that support eczema-prone skin.

Also in this cluster:

Laundry mistakes every eczema parent makes (but can easily fix) — the full list of laundry errors that affect eczema regardless of temperature, including machine residue and shared loads
How to prep new clothes before wearing: avoiding contact dermatitis — the temperature guidance for preparation washes and why cool is right even for new clothing
How to wash clothes for eczema: step-by-step guide — detergent selection, dose, and rinse cycle practice at every temperature
Could dust mite allergy be at the root of your eczema symptoms? — how to identify whether dust mites are a driver of your child’s eczema before deciding how much to prioritise hot-washing
How mattress and pillow protectors help with eczema — the encasements that reduce mite burden and can themselves be hot-washed, protecting the delicate eczema clothing from needing to be
Best laundry detergents for eczema: sensitive skin guide — including the eucalyptus-based options that support mite reduction at lower temperatures
Why bamboo fabric helps calm itchy, inflamed skin — why the properties hot washing destroys are the same ones that make bamboo so effective for eczema

Explore the Bamboo Bubby by Nella Vosk eczema pyjamas and sleepwear for kids and adult eczema sleepwear range — designed to be washed at 30 to 40 degrees Celsius and to remain effective wash after wash when the laundry routine behind them is right.

Author Bio

Written by Kelly Northey, Certified Postpartum Nutrition Professional (CPPNP) and founder of Nella Vosk.

With over 16 years building the Bamboo Bubby eczema range, Kelly understands the specific laundry and care practices that preserve the properties eczema families depend on — and the common mistakes that quietly undo them.