To reduce exposure to these mites, wash bedding at least once a week, remove bulky curtains and extra rugs, keep only washable stuffed toys, and dust and vacuum regularly. House pets can be a problem if owners are allergic to them. The most common pet allergen is hair, but pet dander can be a problem. Take steps to prevent pets from lowering indoor air quality. These include bathing the pet often and grooming it outside, cleaning the house regularly and not letting the pet sleep in the room with the allergic person.
Smoking also does major harm to indoor air quality.
In addition to the cancer-causing nature of cigarette smoke, it can cause respiratory problems in those who breathe it. To avoid contamination of indoor air, do not smoke indoors or around those with respiratory problems. Recommendations on this web site do not endorse any commercial products or trade names.