Milk froth is poor, large bubbles, or only hot milk is dispensed.

Safety first: Unplug the machine and allow the steam circuit to depressurize before disassembling the frother.

Step-by-step:

• 1. Disassemble frother: Remove the Siemens milk frother, suction tube, and any small inserts. Soak in warm water with detergent, then rinse thoroughly.
• 2. Clean air intake: Locate the small air hole on the frother body and ensure it is not blocked. Use a fine needle if necessary.
• 3. Use correct milk: Use fresh, cold milk (3–3.5% fat). Very low-fat or lactose-free milk may froth poorly.
• 4. Replace seals: If the frother drips or draws air incorrectly, replace its O-rings and seals with Siemens-compatible parts.
• 5. Run milk cleaning program: Use the built-in milk cleaning cycle with Siemens milk system cleaner to flush internal milk lines.