To get rid of dust mites, you must lower indoor humidity below 50 percent and wash fabrics weekly in hot water. The question that comes up every time is which product kills them, and neither the American Lung Association nor AAFA names one. Dust mites are microscopic pests. They live inside household fabrics and survive by taking moisture directly from ambient air. You cannot eliminate every mite from a home. However, you can manage the population and cut allergen levels by controlling moisture and laundering textiles on a strict schedule.
According to the Asthma and Allergy Foundation of America (AAFA), about 20 million people in the United States have a dust mite allergy. Dust mites feed on dead human skin cells, according to the American Lung Association.
Controlling these pests requires a combination of humidity regulation, hot water washing, and physical barriers. Neither source names a special detergent.
Controlling Indoor Humidity Below Fifty Percent
Dust mites do not drink water, so they depend entirely on ambient moisture absorbed from surrounding air. According to the American Lung Association, dust mites thrive in warm, humid settings. The American Lung Association recommends keeping your home below 50 percent humidity.
The Asthma and Allergy Foundation of America (AAFA) recommends keeping indoor humidity between 30 and 50 percent. AAFA notes that dust mites thrive in temperatures around 70°F and above paired with humidity above 50 percent. Tracking indoor air with a hygrometer shows whether a room stays above 50 percent.
When a room reads above 50 percent, a dehumidifier lowers it, and how to lower humidity in a room covers the options. AAFA says dust mites thrive above 50 percent humidity, so a room held below that line lacks one of the conditions they need.
| Organization | Recommended Humidity | Bedding Wash Water | Vacuum Standard |
|---|---|---|---|
| American Lung Association | Below 50 percent | At least 120°F weekly | Vacuum with a HEPA filter weekly |
| Asthma and Allergy Foundation of America (AAFA) | Between 30 and 50 percent | At least 130°F weekly | Vacuum with a HEPA filter weekly |
Washing Fabrics Weekly in Hot Water
Both sources set a weekly hot-water wash for bedding and differ only on the minimum temperature. The American Lung Association says to wash bedding in hot water at least 120°F once a week. The organization also advises washing stuffed animals weekly in hot water.
The Asthma and Allergy Foundation of America (AAFA) recommends washing bedding weekly in water at least 130°F. Between the two recommendations, the AAFA target of 130°F is the more conservative figure. Check fabric care labels before running hot wash cycles.
Neither the American Lung Association nor AAFA names a specific laundry detergent for dust mites. Water temperature and weekly washing are the documented method. Relying on specialized detergents without hot water does not follow health guidance.
The American Lung Association recommends washing bedding in water at least 120°F, and the Asthma and Allergy Foundation of America recommends at least 130°F. The 130°F target is the more conservative standard. Always check fabric care labels on bedding and stuffed toys to ensure fabrics can handle hot water cycles without damage.
Allergen Encasements for Mattresses and Pillows
Mattresses and pillows get covers because bedding is one of the places dust mites live. According to AAFA, dust mites live in bedding, upholstered furniture, carpets, and stuffed toys.
The American Lung Association recommends covering mattresses and pillows with allergen encasements. AAFA similarly advises using zippered allergen-barrier covers on these items.
Encasements do not replace laundry. Sheets and pillowcases still go in the weekly hot wash with other bedding.
Solid Flooring and Weekly HEPA Vacuuming
Carpet is one of the places AAFA says dust mites live. The Asthma and Allergy Foundation of America (AAFA) recommends removing carpeting where possible in favor of solid-surface flooring.
Both the American Lung Association and AAFA recommend using a vacuum with a HEPA filter weekly. Neither source names a vacuum brand, only the HEPA filter and the weekly schedule.
The American Lung Association also advises reducing clutter and stuffed toys. Stuffed toys you keep go in the weekly hot wash, per the same source.
Air Cleaners and Certified HVAC Filters
If your home has a furnace or central air conditioning, AAFA advises installing certified filters with that system. A room air purifier has a narrow job with dust mites. Dust mite allergen is carried on relatively heavy particles that settle quickly after being disturbed. Because the particles drop rapidly, an air purifier mainly catches what is airborne for a short time after bedding is shaken or the room is vacuumed. It does not capture allergens that remain settled on surfaces.
An air purifier does not remove dust mites living inside fabric, carpets, or upholstery. Our guide to using an air purifier for allergies details how air filtration works on suspended particles. Air purifiers cannot replace weekly hot water washing or regular vacuuming.
Medical Testing and Immunotherapy for Long-Term Relief
You cannot confirm dust mites by looking for them. According to the Asthma and Allergy Foundation of America (AAFA), dust mites are about one-quarter to one-third of a millimeter long. They remain completely invisible to the naked human eye.
An allergist confirms a dust mite allergy with a skin prick test or blood test. When avoidance and medicines are not enough, AAFA says allergy shots (immunotherapy) given over 3 to 5 years can give lasting relief. Talk to an allergist about whether they fit your situation.
A Weekly Dust Mite Routine
The American Lung Association and AAFA guidance on dust mites reduces to five habits covering bedding, encasements, toys, vacuuming and humidity. If a hygrometer shows a room above 50 percent, a dehumidifier lowers it, which keeps that room out of the humidity range where AAFA says mites thrive. What would change our answer is clinical research proving that specialized detergents or air purifiers remove settled fabric allergens without hot water washing. Start this week by reading room humidity with a hygrometer and washing your bedding in hot water.
- Wash bedding weekly in hot water, at least 120°F (American Lung Association) or 130°F (AAFA).
- Cover mattresses and pillows with zippered allergen-barrier encasements.
- Wash fabric stuffed toys weekly in hot water and reduce unnecessary bedroom clutter.
- Vacuum carpets, rugs, and furniture weekly using a vacuum with a HEPA filter.
- Maintain indoor humidity between 30 and 50 percent using a dehumidifier when needed.
Common questions
What kills dust mites immediately?
Neither the American Lung Association nor the Asthma and Allergy Foundation of America (AAFA) names an immediate kill method. Both groups recommend managing mite populations through washing and moisture control. The American Lung Association recommends washing bedding weekly in water at least 120°F, while AAFA recommends water at least 130°F. AAFA also advises keeping indoor humidity between 30 and 50 percent, since dust mites thrive above 50 percent.
How do I tell if I have dust mites?
You cannot tell by looking because dust mites are invisible to the naked eye. According to the Asthma and Allergy Foundation of America (AAFA), dust mites measure about one-quarter to one-third of a millimeter long. AAFA states that an allergist confirms a dust mite allergy with a skin prick test or blood test.
Which laundry detergent kills dust mites?
Neither the American Lung Association nor the Asthma and Allergy Foundation of America (AAFA) endorses a laundry detergent for dust mites. The documented method is washing bedding weekly in hot water. The American Lung Association advises using water at least 120°F, while AAFA recommends at least 130°F.
Does an air purifier get rid of dust mites?
An air purifier cannot eliminate dust mites. Mites live embedded in fabric, while their heavy allergen particles settle quickly and only float briefly after bedding is shaken or a room is vacuumed. Documented controls from respiratory health groups include keeping humidity below 50 percent, encasing mattresses, washing bedding weekly in hot water, and installing certified furnace filters. Compare supplemental room units in our guide to choosing an air purifier for allergies.
What humidity level stops dust mites from thriving?
Dust mites thrive when indoor humidity rises above 50 percent. The American Lung Association recommends keeping your home below 50 percent humidity, while the Asthma and Allergy Foundation of America (AAFA) advises keeping indoor humidity between 30 and 50 percent. Dust mites do not drink water and rely on absorbing moisture directly from the surrounding air.