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The relative humidity in your home, particularly in your bedroom, will have a significant effect on the house dust mite population. Dust mites need warm humid air to survive. They also need a type of fungi to break down the dead skin cells on which they live. This is also dependent on a certain level of moisture in the air.
A dehumidifier works wonders at removing moisture and eliminating the source of food and drink that the dust mite depends upon. The ideal humidity level is between 40 - 60%. If you are dust mite or mould allergic we recommend that you keep the humidity level between 40 - 50%. Always deal with sources of moisture so that leaks are fixed. You should also control the amount of humidity you generate through your own activities, for example drying washing on radiators.
Dehumidifiers are not a treatment for dust mite allergy, but they reduce the humidity necessary for the mites to survive and reproduce. A dehumidifier is an important part of house dust mite control measures, alongside a thorough cleaning and mite-proofing regime.