The cappuccino maker is dirty.
Remove the components and clean them
Follow the Step-By-Step guide below to achieve proper cleaning
When cleaning the milk container, do not use detergents, abrasive sponges, or metal objects to remove any milk deposits.
Clean the milk container each time you prepare milk as described in this step by step guide
**In a dishwasher (recommended): **
Rinse all components and the container with hot running water (at least 40°C), then place them in the top basket of the dishwasher and run a programme at 50°C, e.g. standard ECO.
Rinse all components and the container with hot running water (at least 40°C), then immerse all the components in hot tap water (at least 40°C) with a mild/neutral washing-up liquid for at least 30 minutes. Rinse thoroughly with hot tap water.