HOUSE DUST MITES ALLERGY: DRAWBACKS AND BENEFITS OF ANTI-DUST TREATMENTS
Apart from the need for follow-up vacuuming, the major disadvantage of chemical products is the need to re-apply (recommended between fortnightly and every six months, depending on make, except for the anti-mite paint) and the consequent cost. The cost of re-applying the treatments runs at somewhere between £100-£200 a year, depending on how extensively you do it, and on which chemical you use. You could pay for an increase in your heating bills to keep things dry, several vacuum filters or a large share of an allergy vacuum cleaner with the same amount of money. You can treat soft toys with sprays, but being often an awkward shape, the treatment does not always reach every part of the surface. If you treat furniture and mattresses, make sure they dry off thoroughly. Light or delicate fabrics can stain.
The nitrogen gas treatment is done by a contractor but is expensive, needs follow-up vacuuming, and has to be repeated frequently if you take no other precautions. It could be useful if you moved into a new home and wanted a once-off treatment to get rid of mites, then followed it up with basic avoidance measures.
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