The most reliable dust mite killer is not a product at all — it is heat. Washing bedding in hot water at 130°F (54°C) or higher, drying on a high-heat cycle, or applying steam kills dust mites directly, and keeping indoor humidity below 50% removes the moisture they need to live. This guide explains what actually kills dust mites, and where a dust mite laundry additive fits in.
Quick Answer
The best dust mite killer is heat: wash bedding at 130°F (54°C) or hotter, dry on high heat, or steam. No detergent kills mites on its own — hot water does. Keep humidity below 50%, and use a laundry additive only when you cannot wash hot.
Dust mites are microscopic, live deep in mattresses and pillows, and feed on the moisture and skin flakes in your bed. Because you cannot see them, it is easy to buy the wrong thing. Below we separate what genuinely kills dust mites from what only claims to.
What Actually Kills Dust Mites
What actually kills dust mites comes down to a short list of physical methods — heat, dryness, and freezing — rather than any single cleaning product. Dust mites cannot survive high temperatures or a dry environment, which is why laundry and humidity control do most of the work.
Heat. Washing at 130°F (54°C) or higher kills dust mites. A hot dryer cycle and steam cleaning do the same for items that go through the wash or can be steamed.
Low humidity. Dust mites need moisture from the air to survive. Keeping indoor relative humidity below 50% removes their basic life support, so fewer mites survive over time.
Freezing. Placing items that cannot be washed hot — such as soft toys or small pillows — in a sealed bag in the freezer kills the mites. Wash or rinse afterward to remove the dead mites and allergens.
Notice what is missing from that list: ordinary detergent. No standard laundry detergent kills dust mites by itself — it helps wash allergens away, but the killing is done by the hot water. For a broader routine that combines washing, humidity, and cleaning, see our guide to dust mite removal.
What Kills Dust Mites
Heat ≥130°F/54°C
Hot-water wash, high-heat drying, or steam — the most reliable killer
Humidity <50%
Removes the moisture dust mites need to survive
Freezing
Kills mites in items that cannot be washed hot; rinse afterward
Laundry additive
An acaricide for when you cannot wash hot — use as directed
The main ways to kill dust mites. Qualitative and source-backed — no invented percentages. Heat is the most dependable method; a laundry additive is a backup for delicate items.
A dust mite laundry additive is a product you add to the wash to kill mites when hot water is not an option. These additives are acaricides — often based on benzyl benzoate — and they are designed to kill dust mites during a cool or warm cycle, which makes them useful for delicate fabrics that cannot handle 130°F (54°C).
The important honest point is that a laundry additive is a backup, not a first choice. When you can wash hot, hot water alone kills the mites and you do not need an additive at all. Where an additive earns its place is with items on a delicate or cold cycle — think decorative covers, certain blankets, or fabrics that would shrink or fade in a hot wash.
How to use one sensibly
Reach for an additive mainly when the fabric cannot be washed at 130°F (54°C) or tumble-dried on high heat.
Choose an EPA-registered product and follow the label for dose, water temperature, and contact time.
Treat the evidence as moderate: additives can kill mites in the wash, but they are not a substitute for the heat, dryness, and regular washing that keep numbers down.
To decide whether you even need to escalate to an additive, it helps to know how heavily your bed is affected in the first place — our guide to dust mites in the bed covers that.
Use Products Safely
Acaricidal additives and anti-mite sprays are pesticides. This page is informational only and is not medical or safety advice. When you use them:
Only use EPA-registered products and read the full label before use
Follow the stated dose, water temperature, and contact time exactly
Take extra care in bedrooms and around children, pets, and people with asthma
Remember that heat and humidity control remain the most reliable methods
If anyone in the home has asthma or a confirmed allergy, discuss your approach with a healthcare professional.
Best Laundry Detergent for Dust Mites
Shoppers often search for the best laundry detergent for dust mites, but the honest answer is that no detergent kills dust mites on its own. Detergent lifts away allergens and skin flakes, yet the mites themselves are killed by the water temperature, not the soap.
That changes how you should shop. Instead of hunting for a special "anti-mite" detergent, prioritize a hot wash at 130°F (54°C) or higher with whatever detergent you already trust, and finish with a high-heat dryer cycle. Reserve a dedicated dust mite laundry additive for the items that genuinely cannot take that heat. If you are dealing with symptoms rather than the mites themselves, our dust mite allergy guide explains the difference.
Frequently Asked Questions
What is the best dust mite killer?
Heat is the most reliable dust mite killer. Washing bedding in hot water at 130°F (54°C) or higher kills dust mites, and drying on a high-heat cycle or using steam does the same. No laundry detergent kills mites on its own — it is the hot water that does the work. Keeping indoor humidity below 50% also removes the moisture mites need to survive.
What is the best laundry detergent for dust mites?
No ordinary laundry detergent kills dust mites by itself. Detergents wash away allergens, but it is the hot water — 130°F (54°C) or higher — that actually kills the mites. If you can only wash on a cool or delicate cycle, an acaricidal laundry additive (often based on benzyl benzoate) can help kill mites in the wash. Choose an EPA-registered product and follow the label.
Does washing in cold water kill dust mites?
Cold or warm water washing removes some dust mites and allergens but does not reliably kill the mites. To kill them, wash at 130°F (54°C) or hotter, or dry the items on a hot dryer cycle afterward. When fabrics cannot take high heat, a dedicated dust mite laundry additive is designed to help kill mites during a cooler wash.
How does a dust mite laundry additive work?
A dust mite laundry additive is an acaricide — often based on benzyl benzoate — that you add to the wash alongside your normal detergent. It is designed to kill dust mites during a cool or warm cycle, which is useful for delicate items that cannot be washed at 130°F (54°C). The evidence for these additives is moderate. Use an EPA-registered product and follow the label directions.
Does freezing kill dust mites?
Yes. Freezing kills dust mites, which makes it useful for items that cannot be washed hot, such as some soft toys or small pillows. Place the item in a sealed bag and put it in the freezer, then wash or rinse it afterward to remove the dead mites and their allergens. Freezing kills the mites but does not remove the allergens on its own.
Can you spray dust mites to kill them?
Some EPA-registered anti-mite sprays are sold for carpets and upholstery that cannot be washed. They can help, but heat and humidity control remain the most reliable methods. If you use a spray, choose an EPA-registered product and follow the label exactly, especially in bedrooms and around children or pets.
Want the full routine rather than a single fix? Start with the dust mites hub to compare killing, cleaning, and prevention across the whole topic.
Sources
Mayo Clinic — Dust mite allergy — Diagnosis & treatment (washing bedding in hot water at least 130°F / 54.4°C kills dust mites and removes allergens; keeping indoor humidity below 50% and using a dryer on high heat also help).
Asthma and Allergy Foundation of America — Dust Mite Allergy (wash bedding weekly in hot water and dry on high heat; keep humidity low to reduce dust mites, which need moisture to survive).
American Lung Association — Dust Mites (wash bedding in hot water and control indoor humidity to reduce dust mite exposure in the home).