Steve,
depending on when you bought you WP dishwasher, there may be a redesigned spray arm available.
From ServiceMatters.com:
KITCHENAID TALL TUB DISHWASHER
Models: KUD01, Serial Code Range: FK28 – FL48
Condition: Customer complains of grit on glasses, poor washability and/or food re-deposited on glasses in the upper rack especially in the corners.
Cause: The upper spray arm is not allowing water to be directed to the corners of the rack, especially if glasses are loaded in an upright position.
Resolution: The upper rack spray arm has been redesigned to improve water spray to all corners of the upper rack. Order and install upper rack spray arm, Part Number 8269022. NOTE: Poor washability may be caused by a number of conditions, such as improper loading, water temperature/ water level too low, detergent/rinse aid dispenser not working properly, etc. It is important to check these other conditions along with the spray arm replacement.
February 2002
BTW: the same applies to Whirlpool TT's: Models: GU1200XT, GU1500XT, GU2300XT, Serial Code Range: Prior to FL48, spare part Number 8269024. (April 2002)
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@ Mike: yeah, those Bosch dishwashers are great

)
Alex
