Vinegar is also an effective way to disinfect the filter of this appliance. Dump out the water in your humidifier. Do this daily to prevent mineral deposits or bacteria growth. Add fresh water to the humidifier. Pour 1/4 cup of white distilled vinegar into the water in the unit. Click to see full answer. Regarding this, is it OK to use tap water in a humidifier?Most cool mist humidifier manufacturers recommend using clean, clear tap water. While tap water may be suitable in many areas of the country, and studies have not conclusively shown that minerals in tap water pose a serious risk, the EPA recommends the use of distilled water for cool mist humidifiers.Additionally, what can you put in a humidifier to prevent mold? By adding a cup of white vinegar, you will be able to prevent the growth of mold inside your humidifier. It easily kills mold spores and doesn’t cause any harm or damage to the components of your humidifier. One may also ask, how do I purify water from my humidifier? Pour a generous amount of hydrogen peroxide or white distilled vinegar into the base of the humidifier. Use a clean toothbrush to scrub away film and mineral buildup. Let the liquid sit in the humidifier’s base for at least 10 to 30 minutes, then pour out the liquid. Rinse by adding and swishing fresh water to the baseWhat can I use to clean a humidifier? Do a deep clean with vinegar. Fill the water tank with a cup of vinegar and a gallon of water. Plug it in outside and let the humidifier run for an hour. After an hour, pour out the remaining liquid from the tank, rinse it with clean water, then fill it with clean water and run the humidifier for another hour.