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The manufacturer states you can use tap water in these devices, but then goes on the disclaim that if you have water with minerals or hard water then white "dust" deposits can occur. Theses deposits are supposed to be noted and if seem, you are to change to filtered or distilled water or purchase one of their filter cartridges. These devices use very tiny holes to produce the mist you get out of them. It takes almost nothing to clog them. You should always use distilled water in these devices to prevent clogging. They also require very regular cleaning to stay clean and thus prevent them from becoming mold fountains. White vinegar and water should be used for cleaning. Avoid detergents as they can gum up the inner workings of the unit.
I generally use White Distilled Vinegar. Clean your unit out the best you can with warm soapy water first and then soak or add the straight vinegar into the filter containment area and use a mild bleach solution for the water tank and soak and swish a little for 15 minutes then drain and rinse with fresh cold water and let air dry. The mineral deposits will slowly dissolve but will still take some scrubbing with a blue pan scrubbing pad or hard toothbrush. Depending on how hard your water is and if you use a water treatment additive will make a big difference in the cleaning process. Some people prefer to use distilled water in cool units as well as steam since it is almost completely mineral free and doesn't cost to much. Regular cleanings based on useage and water condition will greatly help the life and good operation of any humidifier including periodic filter changes if required.
You could add an inline water supply filter. That would help some, since it appears you have a hard water situation. A 50/50 solution of white vinegar and water will clean the existing lime scale. Adding a whole house water softener is also a good solution.
There is a Wicking Filter that is also the same media that creates the humidity. This filter looks like rolled up paper media(like for a swamp cooler). This filter installs at the back of the unit with the water resevoir removed. The water then is absorbed by this media and as the air passes through it humidity is released into the air. The Wicking Filter will need to be replaced when the performance of the unit decreases and the material becomes hard from mineral deposits. There is also a Protec Cleaning Cartridge that looks like a small plastic ball with a stem on it. Inside this cartridge are softening agents that remove hard minerals and extend the life of the Wicking Filter. The Cleaning Cartridge is just simply placed inside the water resevoir. To prolong the life of the Wicking Filter and unit make sure to use clean and cool water. Distilled water will work the best if available. The harder the water you use the more the unit will need cleaning due to hard water. When the unit becomes clogged with diposits you will need to run a solution of vinegar and water through the unit to clean it. If you use distilled or filtered water(reverse osmosis) then the unit will rarely need cleaning.
SPECIAL NOTES Discoloration/Black Particles
After use, the water residue in the bottom of the container may contain black particles, and, in
some areas the water and the bottom of container may discolor. These conditions are normal and
do not effect the purity of the steam or medicine. The container is easily cleaned with soap and
water. Rinse and dry the container after cleaning.
This was taken from the manual that comes with the humidifier...
You cannot do it as it need a specialist's skill.What i do is to insert a bubble tea's drinking straw and insert it into a vacuum cleaner's attachment that is formed like a **** and attach the other end into the grills of the device and gently vacuum the dust away.Good luck.
I have had the same problem , off and on, on my two 700 units for over 4 years. It is caused by water hammer which results when a water solenoid valve closes quickly under pressure. Refer to your owners manual or get a copy of it off the internet. Note the areas where they tell you to remove and clean the inline water strainer and the inline orifice restrictor. These are VERY small components and can clog up easily so they need to be cleaned per the manual. While cleaning them won't totally eliminate the problem it has helped mine with the noise. You really need to have a qualified person, like a plumber, install a small, water hammer arrestor in the inlet line. The trick is to be sure it ends up parallel to the water line flow and not perpendicular to it.... a common mistake. If you are not qualified to work on solenoids and piping, don't do it......it will end up costing you more to repair your mistakes. Good luck
first of all:
disassemble the device to its basic components
and clean them well
- clean the filter of the device well:
take it out, wash it well with hot water,
dont squeeze it let it dry ...
maybe the humidity gauge isnt working ... check it with antoher gauge