If dishes aren’t loaded properly, it can be difficult for the water spray to easily reach them. This can mean that soils and detergent aren’t rinsed away effectively. You may also notice marks or scratches on some of your dishes.
What to do:
Load items carefully
A properly loaded dishwasher helps ensure an optimal clean for each item. Dishes should always be placed soiled-side down and inward toward the spray arms. Space items out and avoid stacking or blocking the spray arms so that water can reach all surfaces for effective cleaning, rinsing and drying.
Black or gray marks on your dishes can also indicate that dishes were loaded too close together. Make sure to keep aluminum utensils and items away from glasses and other dishes to avoid these marks.