(0) Important prerequisite: Maschine is in stand-by, filter status off.
(1) Press the rinse button for four seconds
(2) Now empty the drip tray as requested, it must be outside for at least 5 seconds.
(3) Dissolve the descaling agent (Ammonium sulfatic acid is best) and pour it into the tank. Place a larger container under the steam outlet.
(4) Turn on the steam tap