I have a GE Potscrubber 700 model dishwasher. The detergent cup no longer stays closed. It is completely free of any build up or detergent that could prevent it from staying closed. I have recycled the machine and tried pressing different options for cleaning to see if that could be the cause of the problem. I suspect that something needs to be tightened or adjusted. Is there a way for a do-it-your-selfer to do this?