I have a GE brand model # GSD2800 G01 dishwasher that is not getting the dishes clean. In the past, I cleaned out the debris on the bottom and in the drain. The dishes are still dirty. I was going to clean out the sprayers but they do not seem to come off easily. I tried a big Channel Lock and I was afraid I would crack the plastic. Can anyone advise on the best way to get the sprayers off and if they have suggestions on how I can get the dishwasher to clean better?