Yes…check to top spray arm for food debris in the holes.
The arm can be carefully unscrewed from the base of the top basket for cleaning…’rattle’ the debris out through the central hole by tipping the arm backwards and forwards.
Thanks. I have tried that and did find stuff in there. But still there seems to be less vigour in the water coming out of the sprey arm. Could there be a blockage else where?
Very likely….if both spray arms are clear, and the food filter in the base is clean then there is probably a problem with control of the water level, caused by an internal blockage which would need an engineer to sort for you. Have a look in Repairs@ for an engineer local to you. It should be simple and straightforward to fix so well worth having done, these dishwashers are particularly reliable and durable.