What should I do if my Keurig K-Duo is only brewing a partial cup or carafe?

First, ensure there is enough water in the reservoir for your selected brew size. Check if the exit needle is clogged and clean it if needed, or run a cleansing brew without a K-Cup pod to clear any blockage. If the problem persists after descaling, the drip stop may be clogged—remove the filter basket and rinse it thoroughly. If none of these solutions work, contact Customer Service. (Page 6)