Question

how allergy occurs during cleaning

Answer 1

Cleaning products — especially spray de-greasers, bleach solutions, and air fresheners — are more likely to have asthma or the kinds of respiratory symptoms, such as coughing and wheezing, that people associate with allergies. Women who already have some type of lung infection or illness are at increased risk from spray cleaning products. The effect appears to be isolated to spray cleaners. Use of cleaning agents in other forms did not have the same effect.

So a little less cleaning — and a little more dirt — could actually be just what the doctor ordered.