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ABOUT WHITE DUST
Use of high mineral content hard water may cause a white mineral residue to accumulate on surfaces
in the room near the humidifier. The mineral residue is commonly called “white dust.” The higher the
mineral content (or, the harder your water is), the greater the potential for white dust. The white dust is
not caused by a defect in the humidifier. It is caused only by minerals suspended in the water.
HOW AND WHY TO USE DEMINERALIZATION CARTRIDGES
The HoMedics demineralization cartridge will help reduce the potential for white dust, a deposit of
minerals left behind from using hard water in your humidifier. The cartridge should be replaced every
30–40 fillings. The cartridge may need to be replaced more often if you are using very hard water. Replace
the cartridge when you notice an increase in white dust buildup. If white dust still forms around the
humidifier after a new cartridge has been installed, consider using distilled water.
If you live in an area with hard water, or use a water softener, we recommend using distilled water for
better results from your humidifier. Never use water-softening additives in your humidifier.
INSTALLATION INSTRUCTIONS
1. Remove demineralization cartridge from packaging and soak in water for 10 minutes.
2. Remove the tank from humidifier base and turn over.
3. Unscrew the tank cap by turning counterclockwise.
4. Fill the tank with water as shown in the How to Fill section of the instructions included with
your humidifier.
5. Add the soaked demineralization cartridge to the tank.
6. Replace the tank cap by turning clockwise.
7. Place the tank back on the base.
Demineralization Cartridge
CLEANING AND CARE
CAUTION: Before cleaning the unit, turn power off and unplug unit from the outlet.
CLEANING THE TRANSDUCER/ULTRASONIC MEMBRANE
The transducer/ultrasonic membrane must be cleaned to remove water mineral deposits when the red
LED above the clean transducer/ultrasonic membrane button is illuminated. Failure to do so may cause
reduced or no mist output.
TO CLEAN THE TANK
Remove the water tank from the humidifier base by lifting it from
the main unit. Unscrew the tank cap and rinse inside the tank
with clean water.
Every day:
Pour out remaining water inside the water reservoir.
Empty and rinse the tank and tank cap before refilling.
Every week:
To remove any scale or buildup, use a 50/50 mixture of
white vinegar and lukewarm water to clean inside the tank.
1. Remove the water tank and extension nozzle
from the humidifier base and set aside. Pour
out any excess water remaining inside the water
reservoir.
2. Clean the transducer/ultrasonic membrane
with a 50/50 mix of white vinegar and water
on a cotton swab. Wipe off with a damp cotton
swab. Press and hold the clean button for 3
seconds until the clean light turns off.
NEVER
touch the transducer/ultrasonic
membrane with your fingers; the natural
oils in the skin can damage the surface.
NEVER
submerge the base in water or any
other liquid.
Transducer/Ultrasonic Membrane
To purchase new Demineralization Cartridges, Model # UHE-HDC4, go back to the retailer (where you purchased your humidifier), or visit
www.homedics.com (US), www.homedics.ca (CAN).
