Sometimes it may take weeks or months of sustained effort to reduce allergen concentrations in your home. This is especially true for the animal allergens which form a very fine powder that can penetrate deeply into your carpets and soft furnishings. So if you don’t see immediate results don’t be discouraged into thinking that the measures you are taking are not effective!
Allergens are not the only factors that can trigger allergy flare-ups. Non-allergic triggers such as cigarette smoke, sudden changes of temperature, strenuous exercise or emotional stress can all prompt an attack. Therefore you must pay as much attention to them as you pay to the allergens.