CDA CDI6121 Use And Maintenance page 22

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. 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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