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Cleaning Your Humidifier Monthly
Failing to clean out your humidifiers well or often enough means that you're not just keeping the air from getting too dry, you're also spraying all sorts of microorganisms—some of which can be harmful to your health—around the room. Unless you change the water frequently and scrub the whole thing down every three days, bacteria, viruses and mold can start breeding in the humidifier's water tank. The resulting pathogen-laden mist can trigger asthma and allergies and even cause flu-like symptoms and lung infections in people who are otherwise feeling fine.

Next: More ways to clean your home without compromising your health