k-cup rim opens up during brewing
I have trouble with my k-cup spitting grounds inside the machine where the k-cup sits during brewing.
I don't believe the problem is the puncture needles or the top gasket. I have cleaned and checked both of these, many times, and the needles seems to be puncturing normally. I think the problem is the k-cup ITSELF.
I have observed that, in about 2-3 out of every 5 cups, the top rim of the k-cup actually separates... so, the leakage is not coming from the needle hole area. The leakage is coming from the edge of the k-cup. It is as if there is too much pressure INSIDE the k-cup during brewing, which forces the top covering of the k-cup, causing it to separate from the plastic cup.