The connection element of the Cappuccinatore (steam outlet nozzle) is soiled.
Carefully pull the stainless steel cover off.
Pull the dispensing unit down to remove it.
Release the upper part with the holder for the milk pipework from the dispensing spouts.
Clean all parts thoroughly.
Clean the surfaces of the central spout and the dispensing spouts with a damp sponge cloth.
Clean any blockages in the milk pipework under running water with the cleaning brush supplied:
Insert the brush in the pipework.
Move it back and forth until all milk residue has been removed.