when the water fills does it sound like water spraying? if not then the water valve needs to be replaced.you will find it at the very bottom on the left or right corner.make sure that nothing is blocking the center tower.that area needs to be clear.the tower extends up through the center and sprays the water to the top drawer.in the tub on the right corner in the back you will see a filter.take that off and make sure there isn't anything blocking the flow of the water.and always prewash your dishes of all the heavy food stuck to them