Disinfect Humidifier Base and Reservoir:

1. Fill humidifier base with 1/4 gallon of water and 1/2 teaspoon of chlorine bleach.

2. Fill the reservoir 1/2 full with water and 1/2 teaspoon of chlorine bleach.

3. Let the solution stand for 20 minutes, swishing every few minutes. Wet all surfaces.

4. Carefully empty the base and reservoir after 20 minutes, and rinse with water until you cannot detect any bleach smell. Dry with a clean cloth or paper towel.

5. Check the Filter Monitor to see if it is time to replace the filters. Depending on water hardness in your area,it may be necessary to change the filter every 1-2 months. Re-insert the wick filters into the wick frame.

6. Refill the water tank as directed with cool tap water, replace the humidifier housing, and turn the unit on.

Hi, I'll get this in two parts because of space limits per answer, beginning with general cleaning and then disinfecting the humidifier base and reservoir (the latter will appear first on the columns of answers) :)

1. Remove the housing and the reservoir from the humidifier and place in sink or tub.

2. Carry the base of the unit to the sink, remove the wick frame and wicks, drain any remaining water and rinse thoroughly to remove any sediment or dirt. Wipe clean, and dry with a clean cloth.

3. Drain the water from the tank into the sink and rinse tank thoroughly. Wipe clean, and dry with a clean cloth.

4. Clean the base by partially filling the base with one 8-oz cup of undiluted white vinegar. Let solution stand 20 minutes, cleaning all interior surfaces with a brush. Dampen cloth with undiluted white vinegar and wipe out entire base to remove scale.

5. Rinse with warm water to remove scale and the white vinegar solution before beginning to disinfect the reservoir.