How to Get Rid of Dust Mites in Your Bed
Getting rid of dust mites is simpler than it might seem. Washing bedding weekly at 60°C, keeping bedroom humidity below 50%, and keeping a washable protector on the mattress together is a good place to start.
But remember, mites live on the moisture and skin cells every sleeper supplies nightly, so the strategy is making the bed a place they can't live. Here's the full method, starting with what makes the biggest difference.
This article offers general guidance. For allergy symptoms and treatment advice, speak to a pharmacist or GP, or start with the NHS website.
Know Your Opponent
Dust mites are microscopic arachnids, invisible at under half a millimetre, that feed on shed human skin cells and thrive in warmth and humidity. A bed offers all three in abundance, which is why mattresses and pillows carry the densest populations in any home. Research estimates a used mattress can host anywhere from one hundred thousand to ten million mites depending on its age and care.
The mites themselves are harmless. The allergy problem is their waste, with each mite producing around 20 droppings a day, and those particles trigger the reactions, from morning sneezing and congestion to eczema flares and asthma symptoms. Around one in five UK adults tests positive for house dust mite allergy, and for that group, the bedroom is where exposure concentrates. The practical target follows directly: fewer mites, and less of their accumulated waste in the fabric you breathe against.
Heat and Water: The Weekly Wash
Washing at 60°C kills mites and rinses their allergen load away, and it's the single most effective routine intervention available. Cooler washes clean the fabric while leaving mites alive, so the temperature matters specifically. Sheets, pillowcases and duvet covers go weekly at 60°C where their care labels allow. Items that can't take the temperature can go in the freezer overnight to kill mites, followed by a normal wash to clear the allergens.
Extend the same logic outward on a longer cycle: pillows and duvets themselves washed two or three times a year, blankets and throws monthly during closed-window season. Every washable layer is a layer mites can't permanently colonise.
Barriers: Starve the Mattress
The mattress can't go in the machine, which is why it accumulates what everything else washes away. A mattress protector that deters dust mites is the answer. It creates a barrier between the sleeper and the mattress interior, so skin cells and moisture land on a washable surface and never reach the mattress itself. Pillowcases do a similar job at closer range, which is one more reason they belong in the weekly hot wash.
Simba's pick: the Quilted Performance Mattress Protector, which carries a wash-resistant anti-dust mite treatment, or the TripleShield Bamboo Mattress Protector if you want a fully waterproof barrier that denies mites the moisture they live on.
The protector itself then gets washed every two to four weeks, as hot as its care label allows, and the mattress beneath stays fundamentally cleaner for years. Add a monthly vacuum of the mattress surface with the upholstery attachment, working the seams and edges where debris gathers, and use a vacuum with a HEPA filter, since standard machines redistribute allergen particles as readily as they collect them.
Dry the Room Out
Mites need ambient humidity above roughly 50% to survive, absorbing all their water from the air, which makes the room's moisture level a lever on the whole population. Below about 45% relative humidity, mite numbers fall substantially on their own.
The practical moves: ventilate the bedroom for ten minutes each morning with the duvet thrown back, since a made bed seals in the night's moisture; dry laundry somewhere other than the bedroom; keep the door open through the day for air circulation; and in persistently damp rooms, run a dehumidifier, which does more against mites than any spray. A cheap hygrometer tells you where the room stands, and winter's heated, closed-window air often lands helpfully dry already.
Cooler helps too. A bedroom held at 16 to 18°C suits human sleep and makes life harder for mites at the same time, so for once the same setting serves both goals.
What About the Bed Itself?
Materials shape how hospitable a bed is. Dense foams resist mite penetration better than loose traditional fillings, and spring-ventilated constructions keep the interior drier than solid blocks. Washable components move the goalposts furthest: a mattress with a removable, machine-washable cover puts the sleeping surface itself into the hygiene rotation, and hypoallergenic fills in pillows and duvets deny mites their preferred organic materials. At Simba, our sleep products designed for cleaner nights stacks those advantages, with zip-off washable mattress covers and machine-washable duvets bringing nearly the whole bed into washing reach.
Some things are past saving, and it's worth being honest about them. Pillows past two to three years carry accumulated allergen loads that washing only partly clears, and a decades-old mattress hosts a population no protocol fully evicts. Putting a protector on an old mattress helps considerably at low cost, and replacement resets the count to zero.
The Bottom Line
A workable weekly rhythm looks something like this: bedding stripped and hot-washed on the same day each week, the duvet thrown back for ten ventilated minutes each morning, and windows opened while the room airs. Monthly, the mattress surface gets vacuumed and the pillows aired. Quarterly, the protector rotation gets checked and any washable blankets cycle through the machine. Seasonally, pillows and duvets themselves take their turn in the wash. Written down it reads like a regime, and in practice it folds into existing housework, holding the population low enough that symptoms stay quiet without any single heroic intervention.
Households with allergic children can run the same rhythm across the kids' rooms, where soft toys join the freezer-then-wash rotation alongside the bedding. Keeping the favourites to a washable few makes the rotation sustainable. But remember that any allergy symptoms that persist despite a well-run protocol are worth raising with a GP, since medical management works alongside a clean bedroom.
FAQs
Washing at 60°C, which kills mites and removes their allergen-carrying waste. Freezing overnight also kills mites in items that can't be hot washed, followed by a normal wash to clear allergens. Lower-temperature washes clean fabric but leave the mites alive.
Every used bed has some, so the practical question is symptoms: sneezing, congestion or itchy eyes that are worst in bed and on waking, and ease away from the bedroom. A GP or allergy test can confirm sensitivity. Treat the bed with the full protocol either way, since lower allergen loads help everyone.
Substantially. A washable barrier stops skin cells and moisture reaching the mattress interior, cutting off the food supply, and brings the sleeping surface into the hot wash rotation. It's the highest-impact purchase in the whole protocol relative to its cost.
Below roughly 50% relative humidity mites struggle, and below 45% populations decline significantly. Morning ventilation, drying laundry elsewhere and a dehumidifier in damp rooms all push the bedroom in the right direction.
Elimination isn't realistic in a lived-in home, and it isn't the goal. Reducing the population and its accumulated allergens below the level that triggers symptoms is achievable with weekly hot washing, encasement, humidity control and regular vacuuming, maintained as routine.
