kenmore dishwasher problem
I have what I think is a fairly simple problem. I need to lift up my bottom impellor and screen filter and remove popcorn kernels which I can see below there. My dishes aren't coming as clean as they used to and I think a house guest has put bowls with pop corn kernels in and they are clogging or somehow impeding getting the dishes clean. I can't seem to remove the plastic large screw type thing in the centre so I can remove the rest and gain access. I can see that it is threaded but it seems to just go round and round and not actually move. I doesn't move easily which makes me wonder if it is just not threaded on properly.Is there a trick or secret to removing this? It's a two year old Kenmore elite, here's a pic.
Thanks in advance for any help you can give me on this,