I have a Kenmore Dishwasher #665-16389300. I want to take off the bottom spray arm so I can get to the screen. I think is it clogged. The last 2 time I ran the dishwasher there was milky water in to bottom. The dishwasher ran normally but when it was done there was about 1 inch of standing water in the bottom. Also another question - would running an empty load with white vinegar help? I live in Florida and we have hard water. Ivorytower42@hotmail.com