CDA wc140in Installation & Use Manual page 21

Please note: Never run a programme without the filters in place.
Incorrect fitting of the filters may reduce wash performance and
potentially damage your appliance.
Spray arms
You should clean the spray arms at least once a month.
1. Remove the lower basket.
2. Pull the lower spray arm upwards to remove it.
3. To remove the upper spray arm, first remove the nut on the upper
spray arm by turning it as in Fig. 9. You should clean and rinse
the spray arms thoroughly before replacing them. Ensure that the
upper spray arm nut is securely tightened when refitting the upper
spray arm.
Dishwasher interior
To deal with an accumulation of dirt, oil or limescale in the dishwasher,
run an intensive programme with detergent when the dishwasher is
empty.
Alternatively, there are specialist dishwasher cleaners available that
can be used.
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