House dust mites
Not a hygiene failure and not removable by cleaning alone. They live on shed skin in soft furnishings, and humidity governs them more than vacuuming does.
In detail
House dust mites are microscopic arachnids that live in soft furnishings and feed on the flakes of shed human skin that make up part of ordinary household dust — the conservation guidance's definition of dust names dust mites and dead skin in the same list, alongside textile fibres, pollen, combustion by-products, insect bodies and food particles. Two things follow that are widely misunderstood. Their presence is a property of a warm, humid, occupied home rather than of a dirty one, so framing them as a cleanliness failure misdirects the effort. And they cannot be removed by cleaning in the way a stain can, because the population is distributed through the depth of a mattress or an upholstered seat rather than sitting on its surface. What the evidence here supports is indirect. Vacuuming with adequate filtration removes surface dust and the skin scale that feeds them, and filtration matters because a poorly filtered machine returns fine particulate to the air. Humidity is the lever the sources return to throughout, and it is the one that changes the population rather than the surface.
What works
HEPA filter is effective against House dust mites Supported
It removes surface dust and the skin scale that feeds them. It does not reach a population living through the depth of a mattress.
Why
- House dust mites is explained by Why different surfaces get different dirt
- House dust mites is explained by Moisture control and recurrence
Aftercare and prevention
- Dusting helps prevent House dust mites
Sources for this page
Sources
Conserve O Gram 15/2: Dusting Guidelines for Stone Objects and Interior Architectural Features
National Park Service, US Department of the Interior · Government or regulator
Relied on for: That household dust is composed of loose surface soil, sawdust, pollen, combustion by-products, textile fibres, hairs, flakes of dead skin, dust mites, insect bodies and food particles. (states this directly)
How To Wash Pillows At Home Like an Expert
Bed Advice UK — The National Bed Federation · Trade or professional body
Relied on for: That the bed trade publishes laundering and protection guidance for pillows and mattresses. (background and mechanism only)
Conserve O Gram 1/6: Choosing a Museum Vacuum Cleaner
National Park Service, US Department of the Interior, 2003 · Government or regulator
Relied on for: That a HEPA filter must remove at least 99.97 per cent of particulates 0.3 microns or larger, and that regular water-filtration floor vacuums are less effective than dry filtration with HEPA. (states this directly)