Our dishwasher (a Baumatic) is failing to rinse properly, it may be
failing to do other things properly as well but the rinsing is the
obvious problem.

The symptom is dirty rinse water left in the dips in the bottoms of
mugs etc. when the wash has finished, and also slightly 'not quite
clear' glasses. The basic removal of dirt seems to be working OK
still, it's just that the rinse isn't clean.

The only other thing I've noticed is that it seems to 'retry' starting
up the main pump/wash motor sometimes. For example I ran a 'rinse
only' cycle recently to see how it went and the pump seemed to try
starting several times (with a momentary sound of splashing water
etc.) before it actually started running continuously.

Does anyone have any ideas what the problem might be?

I've checked for blockages as far as I can and have cleaned all the
filters very thoroughly.

--
Chris Green