I broke a glass in my dishwasher which instead of breaking into a few pieces, burst into hunderds of pieces as if it were made out of tempered safety glass. Anyway, some of those pieces got into the lower spray arm assembly during the next cycle, preventing it from turning properly. I have cleaned out the rest of the dishwasher, pump, sump, etc. but I can't figure out how to get the spray arm off to clean it. The GE 800 help line was of no help. The model is a 6 year old Potscrubber 800. Anyone have an idea or service manual that would help? Thanks in advance, Dodgeman