As I scoured through customer reviews and buying guides to find the best humidifier, the Levoit was the clear answer. It’s designed to work in spaces up to 290 square feet, which is just right for my medium-sized bedroom. And it has a tank large enough to last for several hours, so it keeps working as I sleep. To buy: $47 (was $55); amazon.com. It has a 3-liter capacity that lasts up to 25 hours, and it’s near-silent on auto-mode. The quiet sleep mode dims the display lights at night, but it’s already unassuming enough that I don’t have to utilize it. My favorite part? It displays the humidity levels in the room and adjusts the mist output, so the humidity stays between the recommended 30 and 50 percent for optimal sleep. Plus, the device automatically pauses at 48 to 49 percent humidity to prevent your space from getting muggy—and it’ll shut off when the water runs out. The leak-proof humidifier has a 360-degree nozzle to evenly increase humidity levels in just a few hours. It has a max fill indicator and a wide opening at the top, making the humidifier easy to fill and clean—the tank is even dishwasher-safe. While it’s compatible with a mobile app and smart speakers, I find the feature unnecessary because I still have to manually fill the tank, and it already displays the humidity levels. And unlike some other humidifiers, this one allows you to add essential oils to fill your space with moisture and scents. Note: be cautious when using them around pets or if you have allergies.