Door seal
Regularly check to see, if there are deposits or foreign objects in the rubber seal behind the door and remove them.
Drain filter
The drain filter collects threads and small objects inadvertently left in the laundry. Check regularly that the filter is clean. Place a container under the filter and unscrew it; some water will come out of the filter. Pull out the filter. Clean the filter under a running tap, then refit it, screwing it fully in.
Water inlet filter
If you notice that the machine is taking longer to fill, check that the filter in the water inlet hose is not blocked. Turn off the water tap. Unscrew the hose from the tap. To do this, depress the small yellow button on the hose. Clean the filter with a stiff brush. Screw the hose back onto the tap.