If the dishes on your upper dish rack aren’t getting clean, check the middle spray arm below the dish rack. It may have cracks or irremovable clogs in the jets. If that’s the case, order a new middle spray arm for your Maytag dishwasher (part #WPW10498900 for most dishwasher models) and follow these steps: 1. Unplug your dishwasher. Always unplug …