Machine produces unusual tastes or odors in coffee, even after cleaning.

Safety first: Unplug the machine before deep cleaning. Avoid harsh chemicals inside the hydraulic system.

Step-by-step:

• 1. Thorough cleaning: Remove and clean the brew unit, drip tray, grounds container, water tank, and milk system with warm water and mild detergent. Rinse thoroughly.
• 2. Run cleaning cycles: Use Siemens cleaning tablets and descaler to clean internal coffee and water paths.
• 3. Use fresh water: Fill the tank with fresh, filtered water. Avoid heavily chlorinated or flavored water.
• 4. Flush system: Run several rinse cycles and discard the first few coffees after cleaning.
• 5. Check storage conditions: Ensure the machine is not stored near strong-smelling chemicals or foods that could be absorbed.