On the rare occasion, a batch of coffee may have undergone an issue (such as over-roasting) during the roasting process, consequently creating too much oil in the beans.
A detrimentally high oil content is problematic, as the ground coffee can bind together resulting in blockages in reusable capsules.
If you experience this with your favourite coffee brand, we suggest chatting to your local roaster about this occurrence, or experiment with switching to a medium roast rather than a dark roast.
Head to the following article for more information on purchasing coffee for reusable pods:
3 Things To Consider When Sourcing Coffee For Your Pods
Decaf And Reusable Coffee Pods