Turn off the humidifier and unplug it from the wall. Remove the tank and the motor housing by gently pulling them straight up off the base. Remove the filter from the base and discard any water from the base. Wipe down all external surfaces with a soft, dry cloth.
Fill the base with 1 cup of white vinegar or 1 cup of DuraRinse Humidifier Cleaner. Let the solution sit for 20 minutes. Scrub the interior surface of the base gently with a cloth or soft brush to remove mineral deposits. Rinse the base out with water.
Fill the water tank with 1 gallon of water and 1 tsp. household bleach. Pour a little bleach water into the base. Let the base and water tank sit for 20 minutes before emptying and rinsing thoroughly.
Turn off the humidifier and unplug it from the wall. Let it sit for at least 10 minutes to cool down. Remove the tank by pulling it straight up off the base. Release the mist chamber by pulling out the locking knob or pushing the locking tab.
Remove the tray from the base and fill it with one cup of white vinegar or one cup of DuraRinse Humidifier Cleaner. Let the solution sit for 20 minutes. Gently scrub the inside of the tray with a cloth or soft brush while the vinegar or cleaning solution is still in it. Rinse out the base with water.
Empty the water tank thoroughly, and then fill it up with 1 gallon of water to which 1 tsp. chlorine bleach has been added. Fill the tray with the bleach/water solution as well. Let the bleach water solution sit for 20 minutes, and then empty out the water tank and tray. Rinse tank and tray thoroughly with water until you can no longer smell the bleach.