The fairly expensive Keurig line of coffee brewers. Apparently they last about a year. This is a model B44 which we had come to rely upon, but over time less and less water came out the spout — what should have been a full cup was half a cup, then less, and less, and finally about none.
No, it wasn’t limed up, and it wasn’t needing to have air blown backwards through it. It was a plain old fashioned failed part due to corrosion.