Grundig HD-1903A Manuel D'utilisation page 11

Humidifying effect is not
good
There is a strange odour
Moisture collects around
humidifier
Storage
Clean the humidifier in accordance with the CLEANING procedure
specified and dry it thoroughly.
Do not wrap the cable around the appliance.
Keep the appliance in its original packaging, at room temperature and
away from babies and children.
Note: The manufacturer reserves the right to make, without prior notice,
changes to the appliance that do not impair its technical characteristics
and are the result of improvements in its design or production
technology.
Disposal
Dispose of the appliance in an environmentally friendly manner. It
should not be disposed of with normal household waste.
Please dispose of it at a recycling point for used electrical and
electronic devices.
You can obtain more information from your local authorities.
Check that the air inlet and outlet are not
blocked.
Clean the atomiser.
If the same water has been in the
appliance for a long time, replace it with
clean water.
Clean the water tank with a vinegar/water
mix.
Leave the water tank open for a while.
Pull out the plug, dry the humidifier and the
wet area, and reduce the mist output.