the dishwasher (a GE model with hard food disposer and god knows how many filters) sometimes gets really clogged and we have to pour vinegar in it and drain it many times and so on.
other times, however, I open it and there's water on the bottom. I start a cycle and cancel it, forcing the water to drain. the water drains completely. why would the water drain now but not 5 minutes earlier?
other times it won't drain when I cancel the program, but if I leave the program go for a while (basically washing nothing) then it drains. what does this do? are the filters cleaning themselves during a wash? should I therefore regularly run the dishwasher empty to keep the filters clean?