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..... Decontaminate your decor. Maintain optimal humidity.. Prevent mold spores. Clean damp areas in the bath, kitchen and around the house to keep mold spores from developing..... Reduce pet dander. If you're allergic to dander, avoid pets with fur or feathers.... Clean regularly. Clean your home at least once a week..... 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....