:confused: After cycle is complete only the dishes and glasses in the upper dish rack are left dirty with food and/or other small particles...bottom rack comes out clean...service man has been back several times and has checked water pressure and temperature (OK), pump and drainage (OK), cleaned upper wash arms and still same bad results...i have used vinegar and CLR a few times...have noticed a small difference but still leaving particles on glasses...any advice to what may be causing this would be greatly appreciated...thank you