You dusted on Saturday, and by Wednesday the shelves are grey again. Household dust is not a sign that you clean badly — it is produced every day by the home itself and the people living in it. Here is where it comes from, why it comes back so quickly, and what actually reduces it.
What household dust is made of
Dust is a mix of very small particles. In most homes it contains:
- Fibres from textiles — clothes, bedding, towels, sofas, curtains and rugs shed fibres all the time
- Skin flakes and hair — from people and pets
- Particles from outside — soil from shoes, pollen and fine dust that comes in through windows and doors
- Particles from everyday life — cooking, candles and paper
Why the dust comes back so fast
Every time someone walks across the floor, sits on the sofa or makes the bed, fine dust is sent up into the air. It floats for a while and then settles again on shelves, skirting boards and furniture. Dry dusting and an ordinary vacuum can make this worse, because part of the fine dust is moved around instead of removed.
How to reduce dust at home
- Dust damp, not dry. A slightly damp microfibre cloth picks up the dust. A dry cloth or feather duster mostly moves it into the air.
- Work from the top down. Start with high surfaces and shelves, finish with skirting boards and floors, so falling dust is removed last.
- Vacuum with a HEPA filter. A HEPA filter holds on to fine particles that an ordinary filter can let through.
- Wash textiles regularly. Bedding, cushion covers and throws collect dust and fibres.
- Take shoes off at the door and use a doormat, so less soil and outdoor dust comes in.
- Fewer open surfaces. Closed storage collects less dust than open shelves full of objects.
- Air out briefly and often. A few short airings a day with windows fully open replace the indoor air.
Where dust hides
The places people forget are often the dustiest: the top of cabinets and door frames, radiators, behind and under the sofa and bed, lamps, windowsills and the back of electronics. A thorough clean a few times a year should cover all of them.
What an air purifier can — and cannot — do
An air purifier with a HEPA filter captures fine particles from the air in the room where it stands. It does not clean surfaces, so it does not replace cleaning. It is most useful exactly when a lot of dust is in the air — for example while cleaning. See how we use one during allergy-friendly cleaning, where it is an add-on.
Want the dust gone properly? Our allergy-friendly cleaning in Copenhagen uses a HEPA-filter vacuum, damp wiping and fragrance-free products — with an air purifier running while we clean as an add-on. Contact us.
Related: Dust mites in bed and sofa · Mattress cleaning · Deep cleaning
This article is about cleaning, not medical advice. If you have an allergy or asthma, talk to your doctor about what is right for you.