1) The sieve in the center of the pod holder is clogged.
Unclog the sieve in the center of the pod holder by holding the pod holder under a running tap. If necessary, use a washing-up brush or clean it in the dishwasher.
If the sieve is still clogged, place the pod holder in a citric acid descale solution and let it soak for 30 minutes.
2) The coffee spout, coffee collector and pod holder are dirty or clogged up.
All parts can be cleaned in the dishwasher or with warm water.
3) The coffee pod(s) are not placed correctly.
The ground coffee inside the coffee pods needs to be evenly distributed.
Place the pods with the convex side pointing downwards in the center of the pod holder.