Ceramic cleaning :
Take the top tray where the ceramic is located. Do not unscrew the ceramic.
Put the tray in your clean sink without blocking the drain and cover the ceramic with tap water and white vinegar (one glass of white vinegar). Let it drain, repeat the operation 2 to 3 times using only tap water.
The white vinegar must disappear completely, so don’t hesitate to rinse the ceramic thoroughly to remove the vinegar smell.
Take a new non-abrasive sponge and rub it over the ceramic and rinse thoroughly.
Caution: be careful not to let vinegar water pass through the filter cartridge, otherwise you risk stripping the cartridge and your water will be undrinkable.