The Icemaker
Bicarbonate of soda is a safe compound and poses no risk to health. It is commonly available and is sold in all supermarkets.
You should only use cold drinking water in this appliance, with water hardness level less than 7˚F.
The water tank can be removed for cleaning, following the steps above, and then lifting it out of the machine.
The water storage tray is located below the ice drawer. In normal use this fills with water, which is chilled and ready for dispensing; this does not constitute a fault.