How do I clean the spray arms?

To clean the top spray arm, remove the empty top rack and turn it upside down. Turn the locking nut counterclockwise to release the spray arm, then remove it and look for obstructions in the nozzles. Flush the spray nozzles under running water if needed, then reinstall. For the bottom spray arm, remove the bottom rack, grasp and lift the spray arm, check for obstructions, flush under water if needed, and then press it back into place until it snaps. (Page 21)