hilton WK 9222, Operating Manual

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CAUTION: Do not use chemical, steel, wooden or abrasive
cleaners to clean the outside of the kettle to prevent the gloss
loss.
4. When not use or storage, the power cord may be wound under the
bottom of kettle.
REMOVAL OF MINERAL DEPOSITS
Your kettle should be periodically descaled as the mineral deposits in
tap water may form scale on the bottom of kettle so as to cause the
operation less efficiency. You can use the commercially available
descaler and follow the instructions on the package of descaler.
Alternatively, you may follow below instructions using the white
vinegar.
1. Fill the kettle with 3 cups of white vinegar, then adding water to the
amount so as to cover the bottom of kettle completely. Leave the
solution in the kettle overnight.
2. Then discard the mixture in the kettle, then filling the kettle with clean
water, boiling and then discard the water. Repeat several times until the
odor of vinegar has been flushes away. Any stains remaining inside the
spout can be removed by rubbing with a damp cloth.