Indoor Air Pollution and Asthma: More evidence that being too clean can cause asthma in children:

Air fresheners, furniture polish and household cleaners may increase the risk of asthma in young children, a study has found. Those exposed to fumes from common domestic products were up to four times more likely to develop asthma than those who were not.

Outdoor pollution from vehicle exhausts is known to exacerbate asthma in susceptible individuals but it seems that staying inside offers little respite. Evidence is growing that indoor pollution caused by household products and appliances may have similar effects..