Every winter, humidifiers seem to pop up everywhere. Stacked on store shelves, spotlighted in home-care roundups and quietly humming in bedrooms across the country. And it’s not hard to understand why ...

Unmaintained humidifiers can become breeding grounds for bacteria and mold, releasing harmful microbes into your home.

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A humidifier is a device designed to add moisture to the air by releasing water vapor or steam. Humidifiers can alleviate issues such as dry skin and frequent nosebleeds, often exacerbated by dry air.