Drinking glasses come out cloudy and etched; silverware isn't shiny; plates, saucers and coffee cups aren't clean; and pots and pans still have left-over food in them.
I'm on my city's water system.
I've tried using Cascade Gel Dishwasher Detergent, Cascade liquid dishwasher detergen, Finish dishwasher pods, Finish Jet-Dry Rinse Aid, etc.
Inside the dishwasher:
I've replaced the detergent dispenser.
I've used a coat-hanger wire to clean out debris clogging the holes in the upper- and lower spray arms.
At the bottom of the dishwasher, I've cleaned broken glass, chicken bones, apple stems, plastic bits and other gunk from the mesh screen, the glass-trap and the sump.
I've filled a shallow bowl with white vinegar, placed the bowl on the top rack and run the empty dishwasher thru an entire cycle. I've done this at various cycles, settings and water temperatures.
but nothing has improved the dishwasher's cleaning performance.