How often should I descale my coffee maker?
You should descale your coffee maker every 3 months. Properly descaling helps maintain the heating element and other internal parts that come in contact with water. Calcium deposits may build up faster depending on the mineral content of your water, making it necessary to descale more often. (Page 5)
From the official Keurig K-Duo Dual Brew Coffee Maker manual, page 5
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