alright, I need you to watch the video at the following link. http://www.repairclinic.com/PartDetail/Food-Chopper-Assembly/8268383/830886?modelNumber=665.13749K601 this video shows you how to take the pump assembly apart and change the food chopper assembly. (you don't have to change it actually) just use the video to get into the pump assembly to clean it out.
when you say its not cleaning good is there food particles and this isn't rinsing good? or is it more a white film on the dishes?