The spout is dirty or blocked.
Follow the guide below for detailed instructions.
"Position 0.5l container under spouts. Press OK to start" is displayed.
After a few seconds, hot water is delivered first from the coffee spouts, then the hot water/steam spout (if inserted) to clean and heat the internal circuit of the appliance.
"Rinsing underway. Hot water from spouts" appears on the display.
To stop rinsing, press "Cancel" or wait for rinsing to stop automatically.
Then extract by pressing the release button:
Also remove the steam connection nozzle by pulling it downwards.
If necessary, clean using a toothpick.
Use the tube brush to scrape off any milk residues.