Hi.... Use your air conditioner. Air conditioning reduces the amount of airborne pollen from trees, grasses and weeds that finds its way indoors. Air conditioning also lowers indoor humidity and can reduce your exposure to dust mites.... Clean regularly. Clean your home at least once a week. If you're likely to stir up dust, wear a mask or have someone else do the cleaning. Cover your nose and mouth if it's cold out.If your symptoms is worsened by cold or dry air, wearing a face mask can help....