Accumulated dirty dishes in sink

I like it when sims leave stuff around the house, gives them a bit of personality and helps to create the ambience for not so neat and slob sims. I have a slob sim that leaves a bunch of dirty dishes on top of the dishwasher, he wouldn't be himself if he stopped doing that. Would be nice if dishwasher worked like the laundry machine in that you could load it with a certain amount of dishes during the course of a day and then press a button to start the wash cycle. Don't like it when there are several plates and some get washed in the dishwasher and some need to be washed in the sink because the dishwasher is already started.