However, if humidifiers are not maintained properly, they can actually worsen allergy symptoms or cause other illnesses. Bacteria and fungi can grow, and these can be dangerous when breathed into the lungs. The “outside” part is key here—you don’t want to breathe in any bleach fumes. Apply a little white vinegar, citric acid powder, or a similar weak acidic substance to your sponge, brush, or cloth, and it will help dislodge the gunk. You should need only about 2 tablespoons of this acid per half-gallon of water.

Certain groups of people have a higher risk of becoming ill with a lung infection. From mold to bacteria, there’s a medley of microorganisms that may make their home in your humidifier, according to the Children’s Hospital Colorado.

A fan projects these particles into the air as mist, which then evaporates. This story was created by Deputy Editor at the Good Housekeeping Institute, Jessica Teich, a longtime product tester, reviewer, writer and editor. Most recently, it was updated by product analyst Olivia Lipski, who covers everything from consumer electronics to home, outdoor, fitness and more.

The 11 Best Humidifiers to Keep Skin Hydrated All Winter and Beyond

They use high-frequency sound vibrations or a nebulizer to break the water into droplets, which are then propelled into the air with a fan or other mechanism. These humidifiers generally do not require a filter and can operate more quietly than evaporative humidifiers. The LV600S also has a warm-mist setting and a tray for essential oils.

If that sediment buildup just won’t budge, pour your weak acid of choice (white vinegar or citric acid) right into the tank or tray and let it sit there for about 20 minutes. Then go at it again with your brush or sponge, and that should do the trick. Once you’ve gotten rid of all the sediment, rinse the pieces in running water and leave them to dry.

The Environmental Protection Agency suggests that a 3 percent hydrogen peroxide solution may be useful for cleaning purposes. But even those without these conditions can develop harmful symptoms from a dirty humidifier.

Decreased Perceived Temperature

Foods high in omega-3 fatty acids, like salmon, avocado, and almonds, are key to unlocking your shiniest hair ever. “Maintaining a healthy lifestyle, particularly through a nutritious diet, is the primary foundation for achieving shiny hair,” Haliti adds.

You’ll also need to replace the wicking filter every couple of months. Humidifiers can be installed as small portable room units, or they can be integrated into your furnace for full-house humidity control. Contact your doctor if you suspect your humidifier is causing any breathing problems. Ideally, the humidity of a room should be between 30 and 50 percent. You can purchase a hygrometer to measure the moisture in your home.

Use good judgment when using a humidifier in a child’s room

Read more about best humidifiers here.

Impeller humidifiers have a disk that spins at high speed and turns water into vapor. Steam vaporizers can be dangerous around children because they can cause burns. However, there are no bacterial or mineral concerns with this technology. It increases static electricity, and most people dislike getting sparked every time they touch something metallic. If you are standing in the bathroom after a hot shower and can see the steam hanging in the air, or if you are outside after a heavy rain, then you are in an area of high humidity.