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If everything looks clean, it sounds like the dishwasher is actually working, there is just an issue with the detergent or the dishwasher itself needs cleaning. I would run an empty cycle with a product called Dishwasher Magic. This will clean everything out in the dishwasher and remove all hard water build up and anything else in the sump and hoses and places you can't reach by taking the unit apart. You can get this product online or at Lowes. Other than that, if you still have problem change detergents and rinse agent. I suggest using Electrasol tablets with Jet Dry Turbo rinse agent for best results.
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The residue that is on the dishes will need to be hand scrubbed off using white vinegar because the residue bakes onto the dishes and won't come off under normal dishwasher spraying. Once they are clean if you are tried Dishwasher Magic as well as Jet Dry Turbo then I would say it's time to get a new dishwasher because there is really nothing else you can do to get the unit to wash better since the pump is definitely working or the dishes wouldn't appear to be clean visually.
Hello again. I'm just following up because I haven't heard back from you and I see this question is still open. Is there anything else I can help you with?