Never use sharp objects to clean a humidifier as that could damage it. Remove the water tank.
Holmes Humidifier Hm3501 User Manual Manualzz
How to clean holmes humidifier. To do so use a bottle brush or another tool that can gently remove the buildup. Remove water from the water tank andor unit base. Descale and disinfect your cool mist humidifier at least once each week. After soaking in vinegar for 20 minutes mineral deposits are much easier to scrape out. Remove the water tank and wick filter then empty any excess water from the tank and base. Make sure you unplug and drain the humidifier before removing the filter.
Humidifiers are used to increase the amount of moisture in the air. For the best results clean the humidifier and change out the water at least once a month. Click here for detailed information on how to clean your humidifier. Vinegar is often the most valuable tool you have to clean a humidifier. The increased humidity makes the home more comfortable particularly in winter when hot dry air from the furnace can cause itchy skin chapped lips and dry sinus passages. Fill base with holmes cleanse clean solution to remove mineral build up.
If your humidifier has a removable tray with filter remove and set aside for later. How to clean a holmes humidifier. Empty the water tank rinse it out and allow it to dry out a bit before replacing it. More serious cleaning requires removing the scale and disinfecting the unit to prevent the growth of algae bacteria and slime. Soak for 20 30 minutes and then rinse the base and re install the wick filter. For deep cleaning tasks warm or hot water will work best.
Turn off and unplug your holmes humidifier. Run enough water to completely submerge the filter. You should clean your cool mist humidifier each day. Fill a sink or bucket with warm water. You should use vinegar on any part of the device that comes into contact with water.