Unplug the Keurig and let it cool
Remove the water reservoir, lid, drip tray, and K-Cup holder
Wash removable parts with warm, soapy water
Rinse and dry all removable parts thoroughly
Wipe the exterior with a damp cloth
Clean the needle area with a paperclip or Keurig cleaning tool
Reassemble the machine
Fill the reservoir with equal parts white vinegar and water, or use a descaling solution
Run brew cycles without a K-Cup until the reservoir is empty
Let the machine sit for 30 minutes if descaling with vinegar or solution instructions require it
Rinse the reservoir and fill it with fresh water
Run several plain water brew cycles until the vinegar or solution smell is gone
Wipe the machine dry
Repeat descaling every 3 to 6 months