How do I perform the initial setup of the K-Express Essentials coffee maker?
Remove packing tape, plug in the coffee maker, and place a large mug (296 ml/10 oz minimum) on the drip tray. Fill the water reservoir to the MAX FILL line with fresh water (do not use distilled water), then lift and lower the handle without inserting a K-Cup pod — the coffee maker will power on automatically. Press the 8 oz button to run a cleansing brew and pour the hot water into the sink to complete the one-time setup. (Page 2)
From the official Keurig K-Express Essentials Coffee Maker manual, page 2
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