If you choose to use a humidifier, whether it’s one for a room or a furnace attachment, take these simple precautions to prevent the buildup of mildew and mold, which can increase allergy symptoms. Change the water frequently. If you have a small, portable, or tabletop humidifier, empty and clean it daily with a mild detergent to avoid mildew buildup and bacteria growth.
If the humidifier has already developed mold or mildew, soak a cloth in a solution of chlorine bleach in water (a scant 1/4 cup to 1 gallon of water) and wipe down the humidifier inside and out. Keep the filters clean. If your humidifier has permanent filters, make sure to clean them regularly.
Change disposable filters on a regular basis. Stay on top of hygiene. If you have a larger or more permanent humidifier or a furnace humidifier, empty the container every 2 weeks and clean it with a mild solution of detergent and water or, if the manufacturer’s instructions allow, use a mild solution of chlorine bleach and water.
Make sure that your humidifier keeps the room at less than 50 percent humidity since dust mites thrive once the humidity level is over 50 percent. If your humidifier doesn’t have a gauge to measure humidity, you can buy one at your local hardware store.
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