The brew unit has not been sufficiently cleaned.
The brew unit must be cleaned manually in addition to the automatic cleaning. A cleaning tablet may be required to degrease the brew unit even if the cleaning cartridge is fitted.
Proceed as follows:
- Open the appliance door. 
- Remove the water container. 
 
- Press the button on the bottom of the brew unit handle (1). 
- Whilst doing so, turn the handle forwards (2). 
 
- Pull the brew unit sideways first (1). 
- Then slide it out forwards (2). 
- Tilt the brew unit forwards (3). 
 
- Rub away any coffee residues from the filters. One filter is located in the funnel. The other filter can be found to the left of the funnel. 
- Dry the funnel to prevent ground coffee sticking to it the next time a coffee is made. 
- Clean the inside of the coffee machine. 
- Use a vacuum cleaner to remove dry coffee residues. 
- Clean the brew unit niche with a damp, clean sponge cloth. 


