Answer to "Why won't my Keurig brew a full cup?"My 2-year-old Keurig 2.0 would not fill a cup. For example, I would get maybe 1-2 ounces when I asked for 12 ounces. After thoroughly descaling and trying multiple solutions found on various sites (including “burping” as mentioned on this site), I called Keurig. After going through their troubleshooting steps, they said the next step was to send me a new water reservoir, which they did for free. I didn’t think it would help, but that actually solved the problem. It’s working perfectly now.