Kim1 - usenet poster
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The instruction manual that came with the pot will tell you to use one cup (measuring cup) of "white vinegar" and fill the rest of the reservoir with regular water. Turn it on and let it perk the mixture through the system. Then perk a couple of pots of plain water to flush out the rest of the vinegar.
The books say to do this once a month to keep things clean and the coffee tasting great.