Skip to main content

Need Immediate Care?

Find Urgent Care Locations

7 Quick Ways to Keep Your Humidifier Bacteria-Free

March 6, 2018
A child reading a book

Humidifiers are a great way to moisturize the air in your home as outside temperatures plummet, helping with chapped skin, allergies and cold and flu symptoms in children and adults. But without regular upkeep, humidifiers can breed dangerous mold and bacteria and do more harm than good. We’ve gathered some tips for keeping your humidifier — and your home — clean and bacteria-free.

Dirty humidifier tanks can quickly breed bacteria and mold. This can be a problem for healthy people, but especially problematic for people with asthma and allergies when the contaminated mist or steam is released into the air. Here are some top ways to keep your humidifier humming and prevent unintended bacterial growth.

  1. Use distilled or demineralized water. Tap water contains mineral-creating deposits inside your humidifier that promote bacterial growth. These minerals often appear as white dust on your furniture. You may also breathe in some of these minerals. Distilled or demineralized water has a much lower mineral content compared with tap water. Instead of distilled water, you can also use demineralization cartridges or filters in your humidifier if they’re recommended by the manufacturer.
  2. Change the water often. Avoid letting water sit in the tank for long periods of time. This causes mineral deposits to collect on the bottom and sides of the tank. The longer the water sits, the more deposits will collect and the harder they’ll be to remove.
  3. Keep the area around the humidifier dry. If the area around your humidifier becomes too damp, turn it down. Surrounding the humidifier with dampness can lead to mold and bacterial growth.
  4. Change the filter in your central air conditioning and heating system regularly. Your humidifier is circulating more water in the existing air in your home. Optimize the cleanliness of your humidifier by ensuring your general air quality is clean.
  5. Clean the humidifier regularly. When the humidifier is in heavy use during the winter or when a family member has a cold, clean it weekly with a simple vinegar or hydrogen peroxide rinse. Do a deep monthly clean of the tank, base and filter (or per your manufacturer’s instructions).
  6. Replace the humidifier when necessary. Old humidifiers may start to break down over time. The worn-out parts will be more prone to hosting bacterial growth. If you’ve had your humidifier for five years, you might want to consider replacing it. Humidifiers can build up difficult mineral deposits, which are impossible to remove and encourage bacterial growth.
  7. Store the humidifier properly. Before putting your humidifier in storage, clean it thoroughly. Throw away any temporary parts (such as used filters or water cartridges) and make sure it is completely dry. Rinse or clean it again before using it the next time. Order any new filters or cartridges you’ll need when you use it again and store them with the humidifier.

With proper maintenance, a humidifier can be an affordable at-home method for fighting colds and flu, and for making indoor winter air more hospitable. If you have a humidifier built into your central heating and cooling system, consult the instruction manual or ask your heating and cooling specialist about proper upkeep.

Learn more healthy living tips and sign up for wellness classes through Renown’s Health Improvement Programs.

Related Blogs

The Electrodiagnosis department at Renown Health poses for a group photo with their equipment.

Department Spotlight: Electrodiagnosis

When a patient is experiencing unexplained seizures, nerve pain or neurological symptoms that don't have a clear cause, finding answers often begins with one critical step: a diagnostic study performed by a skilled neurodiagnostic technician. At Renown Health, the Electrodiagnosis (or Neurodiagnostics) department provides these essential services every day. Think of our Electrodiagnosis team as your brain puzzle masters. Their impact spans both inpatient and outpatient settings, serving patients of all ages who are living with epilepsy, a traumatic brain injury, neuropathy, ALS (Lou Gehrig’s disease) and more. While their work may look like "squiggly lines" on a screen, the insights they capture are anything but simple.
Read More Department Spotlight: Electrodiagnosis
Women having fun eating ice cream cones

The Secret to Glowy Skin All Summer Long

If your skin is craving a glow-up, it’s time to treat yourself to the Classic Facial + Omnilux — the perfect combo of self-care and science, brought to you by the experts at Renown Dermatology, Laser & Skin Care. Think of it as a reset button for your face, just in time for summer. Whether you're prepping for poolside selfies or simply want to feel your freshest, this fun, feel-good treatment is your go-to.
Read More The Secret to Glowy Skin All Summer Long
View All Blogs

Related Events

View All Classes & Events
ER Wait Times

How are wait times calculated?

Our estimated ER wait times reflect the average time from check-in to being seen by a medical professional during triage, where patients are prioritized based on the severity of their condition.

Health & Wellness eNews
Sign Up