Hello there, Use your air conditioner. Air conditioning reduces the amount of airborne pollen from trees, grasses and weeds that finds its way indoors. Decontaminate your decor. Minimize dust that may worsen nighttime symptoms by replacing certain items in your bedroom. Prevent mold spores. Clean damp areas in the bath, kitchen and around the house to keep mold spores from developing. Get rid of moldy leaves or damp firewood in the yard. Reduce pet dander. If you're allergic to dander, avoid pets with fur or feathers. Cover your nose and mouth if it's cold out.