Jura IMPRESSA XF70 Short Operating Instructions page 6

Cleaning the 2-stage frothing jet
TIP:
To ensure perfect operation of the 2-stage frothing jet, we
recommend you clean it regularly.
Hold the nozzle at the top and at the bottom end or use a 7 mm
open-ended spanner
Screw the nozzle apart
Thoroughly rinse the 3 parts under running water
NOTE:
The display will not prompt you to clean the 2-stage frothing jet
Notes