Challenge HTJ-2027 Instruction Manual page 6

Flume cleaning
If there is any limescale in the flume, wipe it with a soft cloth and wash it with
clean water.
Atomiser chip cleaning
Apply detergent to the surface of the atomiser chip and then pour in warm water
and wait for 5 minutes. Gently brush around the opening and rinse again with
clean water. Take special care not to submerge the main unit in water or splash
the controls.
Note: Only use a small amount of water to clean the atomiser chip and base unit,
do not rinse under a tap as this will damage the unit.
Maintenance of Water Filter
Remove the water filter from the unit by unscrewing. Wash the filter in warm
soapy water and rinse thoroughly. Refit the water filter.