For a long while now, our dishwasher has been getting worse and worse on washing dishes. We could just not seems to make the machine get them clean. I have a Maytag Jetclean Quiet Pack model MDB4100AWQ. Google was no help. There are no manuals for my model available online, it seems.
I did find a site that shows some portions of a manual
mostly to sell you parts. What it turns out is that both washarms (top and bottom) were clogged. The washarms were clogged with bits of plastic. Badly. I just spent an hour, without benefit of a manual, disassembling my dishwasher. I unclogged the wash arms and cleaned up around the intake as best I could. As near as I can figure, the plastic went through the filter into the cutter (all dishwashers have a sort of DisposAll food grinder feature) and was diced up enough to make it through the pump. But it wasn't small enough to make it out the washarms' spray holes. I'll need to be more careful of what makes it into my washer. Nothing with a label for sure.
Fortunately, Maytag designed it to be fairly simple to repair. You just have to apply a little more thought into how the thing appears to be built and NEVER force anything. Just a good examination revealed the parts that unscrewed or unlatched and how to to it. I didn't even need a screwdriver. I used a pair of needle nose pliers to remove the upper washarm. That was it.