Things You'll Need
Toothpick or small, stiff bristled brush
White cloudy material in your espresso machine is the result of mineral deposits. While they can develop over time in any machine, they are particularly common in areas that have hard water. The mineral deposits are harmless to drink, but can adversely affect the taste of your espresso and the performance of your machine. Fortunately, cleaning the cloudy residue from your espresso machine is a straightforward process that does not require any special equipment or skills.
Fill the reservoir tank with equal parts water and white vinegar.
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Start the machine and let it run for a few minutes.
Stop the machine, unplugging if necessary. Let the mixture soak in the machine for one hour.
Restart the machine and finish the cycle.
Clean the gasket and screen above the filter basket with a toothpick or small stiff bristled brush.
Run two complete cycles of plain water through the espresso machine to remove any lingering white vinegar residue.