
The ideal range for relative humidity indoors is around 30-50%, but did you know that most homes that are heated to 73 degrees have a relative humidity of just 15%? That’s 10% lower than the typical humidity of the Sahara Desert!
When air is that dry, it can lead to issues like dry skin, chapped lips, and staticky hair. Dry air can also dry up the natural moisture in your nasal passages, worsening snoring and causing nosebleeds. Dry air even creates a more favorable environment for the transmission of viruses like the flu!
But dry air doesn’t just impact your body and health—it can harm your stuff too! Dry air in your home can sap your houseplants of much needed moisture and cause wood furniture to crack or warp over time.
So what’s the answer to the problems posed by dry indoor air? A humidifier! Humidifiers produce water vapor that increases the humidity in the air, offsetting the effects of dry air to keep you (and your possessions) more comfortable.

Why It’s Important To Keep Your Humidifier Clean
As beneficial as using a humidifier can be, it can actually be harmful to your health if isn’t cleaned often. Regardless of whether your humidifier produces a warm or cool mist, the moist conditions inside can make it a breeding ground for bacteria and mold, and it may end up spreading that bacteria and mold in to the air around your home!
So in order for your humidifier to be a help rather than a hindrance, it’s highly important to keep it clean and sanitized! Since I’ll be dragging my own humidifier out of the closet this week, I thought it would be a good time to share some tips and tricks to help clean your humidifier and keep it safe and sanitary!

General Guidelines For Using A Humidifier
- Read the owner’s manual. If you don’t have it anymore, you can probably look it up online. While most humidifiers can be cleaned the same way, some parts may differ, so it’s good to know about any instructions the manufacturer has provided.
- Always empty the water tank and water reservoir when not in use. Bacteria can grow in as little as one to two days, and you don’t want to give it that chance!
- Fill the tank with fresh water every day. Fill your humidifier’s water tank with fresh filtered water or distilled water daily. You can use unfiltered tap water, but hard water has minerals that can leave mineral deposits inside of your machine. Minerals in the water can also cause your humidifier to leave behind a (harmless) white dust on surrounding surfaces. For that reason, I recommend filtered or distilled water.
- Clean and disinfect your humidifier at least once a week. Use the steps outlined below to deep clean and disinfect your humidifier (in that order) once a week.

How To Clean A Humidifier
You’ll need:
- Small scrub brush (or toothbrush)
- Distilled white vinegar
Directions:
- Start by unplugging your humidifier, then remove the filter (if your machine has one) and rinse it with cool water. Some chemicals can cause permanent damage to humidifier filters, so it’s best to clean it with water only. Set the clean filter on a towel and let it air dry, then replace it.
- Next, pour 1-2 cups of undiluted white vinegar into the water tank and swirl it around to wet the entire interior of the tank. Then replace the tank into the humidifier base, allowing vinegar to flow into the reservoir, and let your humidifier sit undisturbed for 15-20 minutes to break up any mineral buildup inside the machine.
- When the wait is up, pour the vinegar into a separate container (but don’t get rid of it just yet.) Use a small scrub brush or an old toothbrush to scrub cracks, crevices, and any stuck-on mineral deposits.
- And finally, dip a cloth or sponge into the vinegar and use it to clean the small parts like the tank cap and the spout where the water vapor comes out. Make sure to rinse the tank and reservoir thoroughly, then proceed with the disinfecting process!

How To Disinfect A Humidifier
You’ll need:
- Bleach or hydrogen peroxide
Directions:
- You can disinfect your humidifier tank and reservoir with the help of bleach or hydrogen peroxide. To use bleach, fill your humidifier’s tank with water, then add 1 teaspoon per gallon of water. To use hydrogen peroxide, pour 1-2 cups of standard 3% hydrogen peroxide into the tank.
- Swirl the bleach solution or peroxide around the tank to coat the inside evenly, then place the tank back into the base and allow it to sit for at least 30 minutes.
- Make sure to rinse the tank thoroughly afterward with clean water, and it’ll be ready to use again!
Related: 30 Uses For Hydrogen Peroxide You’ll Want To Know About
So get that trusty home humidifier out, give it a good cleaning, and use it well this winter—your home and your health will thank you!
Do you use a humidifier during the winter?

Clean & Disinfect a Humidifier
Equipment
- Scrub Brush
- Toothbrush
Ingredients
- 2 cups White Vinegar
- 1 tsp Bleach
- 2 cups Hydrogen Peroxide
Instructions
Cleaning the Tank
- Unplug your humidifier, then remove the filter (if your machine has one) and rinse it with cool water. Some chemicals can cause permanent damage to humidifier filters, so it’s best to clean it with water only. Set the clean filter on a towel and let it air dry, then replace it.Pour 1-2 cups of undiluted white vinegar into the water tank and swirl it around to wet the entire interior of the tank. Then replace the tank into the humidifier base, allowing vinegar to flow into the reservoir, and let your humidifier sit undisturbed for 15-20 minutes to break up any mineral buildup inside the machine.Pour the vinegar into a separate container (but don’t get rid of it just yet.) Use a small scrub brush or an old toothbrush to scrub cracks, crevices, and any stuck-on mineral deposits.Dip a cloth or sponge into the vinegar and use it to clean the small parts like the tank cap and the spout where the water vapor comes out. Make sure to rinse the tank and reservoir thoroughly, then proceed with the disinfecting process!
Disinfecting The Humidifier
- Fill your humidifier’s tank with water, then add 1 teaspoon of bleach per gallon of water. If you prefer not to use bleach, pour 1-2 cups of standard 3% hydrogen peroxide into the tank.Swirl the bleach solution or peroxide around the tank to coat the inside evenly, then place the tank back into the base and allow it to sit for at least 30 minutes.Make sure to rinse the tank thoroughly afterward with clean water, and it’ll be ready to use again!