DeLonghi NESPRESSO VERTUO POP ENV90.B POP Mode D'emploi page 20

Clean your machine on a monthly basis, when you start having
coffee residue inside the machine head or after a long period of
non-use.
Rinse and clean the water tank and the lid before filling it
1
with fresh drinking water.
Put the water tank back in position on the machine.
2
CLEANING – PAGE 1/3
CLEANING
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