I also buy my filters online and soak standing up in a stock pot with white vinegar that goes up to the dark/dirty part. The number 3 instruction was taken out. The Sharp A Black Air Conditioner Humidifier, Sharp air Wirecutter recommends spraying the fan, through the slats, with a vinegar solution, and then scrubbing at the fan with a bottle brush. How to clean honeywell humidifier fan . Do not direct moisture flow directly at The process of cleaning a honeywell tower fan is quite different from the typical tabletop fans. For units that use a honeywell humidifier filter, simply flip the humidifier filter (top to bottom) when you’re in the process of refilling the tank with clean water. Place all removable parts in a white vinegar bath for 30 minutes. To clean a wick, honeywell recommends soaking it in clean water for 20 minutes and swishing it around to dislodge mineral buildup. If your system includes an atomizing humidifier, you may want to install a standard furnace fi...