The water connection pressure is too low.
Clean the water inlet filter.
Select a programme that uses more water (Water plus if available).
Powder detergent is left behind in the detergent drawer of the washer-dryer. A large proportion of the detergent does not get flushed through during dispensing.
Clean the water inlet filter.
Select a programme that uses more water (Water plus if available).
Clean the detergent drawer as described above.
In the future, add powder detergent to the compartment first, and then add the water softener.
Pull out the detergent drawer until resistance is felt.
Press the release button.
Remove the detergent drawer.
Clean the detergent drawer with warm water.
Use a bottle brush to remove detergent residues and limescale from the nozzles inside the detergent drawer.