Coffee oil build-up in the brew unit could affect your coffee's taste and your machine's smooth functioning. While taking out the brew unit for rinsing under the tap helps, for a more thorough clean, these oil removal tablets keeps your brew unit in better condition for a longer period. 

1. Pop a tablet down the pre-ground bypass shoot and select pre-ground coffee to start brewing.

2. Let the oil-removing solution sit for 15 minutes. 

3. Take out the brew unit to rinse thoroughly under the tap and insert back into the machine.

4. Select pre-ground coffee again but this time without adding coffee or cleaner and brew again. The machine will dispense water through the spout. 

5. Repeat above step twice.