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Keeping your Central Florida home humidified is a must, especially when dry, warm air is circulating through your house during the cooler months. Dry air can affect your home’s indoor air quality (IAQ), possibly causing throat and lung irritations, especially in infants and the elderly.

Dirty humidifiers harbor bacteria and mold that can lead to serious illness, irritating existing health conditions and triggering new ones. No matter which type of humidifier you own, there’s a way you can dissolve hot water humidifier stains.


First, read through the owner’s manual, especially if you’re unfamiliar with your unit’s working parts. Make sure you always unplug your humidifier before doing any cleaning.

  • Remove the filter, rinse it well and lay it on a clean, dry cloth to dry. Never use any detergent or cleaning solutions on the filter, as chemicals can cause damage.
  • Empty the tank, then add a generous amount of undiluted white vinegar. Allow it to sit for at least 30 minutes before gently scrubbing it with a soft bristle brush. Then, rinse the tank thoroughly.
  • Wipe down the outside of your tank with a cloth dampened with vinegar and warm water or a soft-bristled brush dipped in vinegar.

Fill your tank with cool water and add one teaspoon of household bleach or 3 percent hydrogen peroxide to every gallon of water. Gently swish the solution to coat the inside of your tank and allow it to sit for at least 30 minutes before rinsing thoroughly.

Final Tips
  • Add a few drops of citrus-based essential oil to every tank to kill bacteria and scent the air. Only use two to three drops in plastic tanks, as higher amounts can cause damage.
  • Consider using distilled water instead of tap water.
  • Cleaning and disinfecting your humidifier at least once a week can improve indoor air quality.
  • Consider buying a hygrometer to measure humidity levels in your home.

For more expert advice on how to to dissolve hot water humidifier stains, please contact NisAir Air Conditioning & Heating. We’ve been serving Martin, Palm Beach, St. Lucie and Indian River Counties since 1973.