Bialetti Contamination or Over-Extraction

Stovetop Bialetti Moka pot develops a metallic or bitter taste in the coffee.

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Possible Causes

Aluminum oxidation or residue, Using soap inside the pot, Coffee left in pot for long periods, Grind too fine and heat too high

How to Fix / Troubleshooting

Safety first: Ensure the pot is cool before cleaning to avoid burns.

  • Clean correctly: Rinse the moka pot with warm water only. Do not use dish soap inside, as it can leave residues that affect taste.
  • Remove old oils: If heavily stained, brew a few cycles with just water and discard. For stubborn residues, use a soft brush and a mild baking soda solution, then rinse thoroughly.
  • Adjust brewing: Use a slightly coarser grind and medium heat to avoid burning the coffee. Remove from heat as soon as brewing finishes.
  • Replace worn parts: If the interior is heavily pitted or corroded, or the gasket is degraded, replace the affected parts or the entire pot.

Persistent metallic taste may indicate advanced corrosion; consider replacing the moka pot if cleaning does not resolve it.

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Repair Difficulty

Very Easy 1/5

Required Part

Moka Pot Body and Gasket
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