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How to Repair an Internal Leak in the Steam Wand of a Starbucks Barista

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Note where the steam valve knob connects to the valve assemble, at the top is a small hex nut. Use the 2mm hex wrench to loosen the nut by turning it counter clockwise, about 1/4 turn. Hold on to the wrench, keeping the steam knob shaft in the upright position.

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