A KitchenAid dishwasher was brought in for repair due to an issue with the upper rack not sliding in and out smoothly. Upon inspection, it was determined that the rack's rollers were worn out and needed replacement. The old rollers were carefully removed, and new ones were installed. Additionally, the rack's tracks were cleaned to ensure optimal performance. After the repair, the dishwasher was tested to confirm that the upper rack now slides in and out effortlessly, restoring full functionality to the appliance.