We have a Maytag dishwasher that we've had for 8-10 years. Over the past 6-10 months it's stopped cleaning as well. There are usually small food particles in the glasses. I've taken and cleaned out everything inside the dishwasher I can think of including pulling out the bottom drain area and cleaning it out. I've also cleaned the arms and the holes in the arms. I can't figure out why I'm still getting small food particles on the glasses? Do I need a new dishwasher?