The manual describes how to disassemble the milk container and clean it manually, but I didn't find anything about automatic cleaning. That seems to be quite an effort when I look at it like that:
CLEANING THE MILK CONTAINER Caution! - Do not use abrasive cleaners or sponges to clean the milk container, and do not use any metal objects to avoid metal objects to remove possible milk incrustations. milk encrustations. The milk container must be cleaned after each milk preparation, To do this, proceed as follows. 1: 1. remove the lid of the milk container and remove all the removable parts. 2; 2. pull out the milk suction tube. 3; 3. turn the milk dispensing tube to a vertical position and pull it out. and pull it out. 4; Press the button to pull out the connector. 5. 5. in the dishwasher (recommended): Rinse all the parts and the container under hot running water (at least 40°C): then position on the dishwasher's top shelf and start a programme at 50°C. dishwasher and start a programme at 50°C, e.g. ECO Standard. By hand: rinse all the parts and the container in hot running water (at least under hot running water (at least 40°C): then immerse all then immerse all parts in hot drinking water for at least 30 minutes. (at least 40°C) with a mild / neutral detergent and rinse abundantly with hot drinking water. rinse with hot drinking water. 6. check the cleanliness of the air tube (on the magnification); then cleanliness. 7; 7. reassemble all the parts of the cover: to reinsert the the connector, press the corresponding button press the corresponding button; 8. snap the lid back onto the milk container.