Hkoenig STM45 Manuel D'utilisation page 13

>>> Cleaning steps:
Pour the remnant water
out of the tank;
Take apart the filter, rinse with clear water all its
accessories as well as the water tank, after which, put the
filter back into the bottom of tank and tighten it clockwise.
PRODUCT MAINTENANCE
Using the water outlet to clean the heating element
>>>Related parts: heating element, metal cleaning plug
>>>Cleaning frequency: Clean every 1 month or 20L water
is consumed, which period may be prolonged or
shortened according to the actual water quality.
>>> Precautions: Before cleaning, turn off the power
supply, pull out the plug and let the machine cool down.
>>> Cleaning steps:
Turn off the power supply, pull out the plug, take down the
support pole and tank, turn over the machine body on
carpet (to avoid scratching the machine), lift up the hood
of cleaning hole, screw out counterclockwise the cleaning
plug with a slotted screwdriver and take it out.
Rinse the cleaning plug, and get the sediments
out of the plug by an iron wire, and get the inner
Screw out
counterclockwise the
tank filter;