A small amount of loose coffee around the brew unit, grounds container or brewing compartment can be normal, particularly in bean-to-cup machines. Grounds can fall during grinding, brewing and when the used coffee puck is discharged. However, large amounts of dry or wet coffee accumulating inside the machine can indicate a brewing, dosing or brew-unit problem.

Dry grounds can appear when ground coffee does not enter the brewing chamber correctly. Possible causes include a dirty or restricted coffee chute, excessive coffee dose, the brew unit being incorrectly positioned or grounds being displaced during the brewing cycle. Clean accessible loose grounds and check that the coffee chute and brew unit can operate freely.

Wet grounds can indicate that water and coffee are escaping from the brewing chamber rather than remaining contained during extraction. Check the brew unit for heavy residue and inspect accessible seals and surrounding areas. If you also notice excess water in the drip tray, weak coffee pucks or reduced coffee volume, the brewing system may not be sealing or draining correctly.

Yes. Coffee oils, fine particles and compacted grounds can accumulate around moving parts and brewing surfaces. This can interfere with normal movement and the formation or disposal of the coffee puck. Regularly cleaning a removable brew unit and the accessible compartment around it helps prevent excessive accumulation.

Coffee pucks do not always come out perfectly formed, and their consistency can vary with grind size, coffee dose, beans and drink settings. Very wet or loose grounds can also occur after certain drinks or rinse cycles. If the pucks have suddenly become consistently very wet or poorly formed alongside weak coffee, unusual brewing noises or excess internal water, investigate the brewing system rather than judging the machine from puck appearance alone.

A few scattered grounds generally aren't concerning. Further investigation is worthwhile when large quantities repeatedly accumulate, grounds appear in unusual areas, the brew unit starts sticking, coffee dispensing changes, or water and wet grounds escape around the brewing mechanism. Clean the accessible brewing area first; if the problem quickly returns, the brew unit, seals, coffee chute, dosing system or drive mechanism may require closer inspection.