...scrape dishes too. (roommate)? Having some roommate issues. It's just small dumb argument of the many. Is it gross to use the same sponge for 4 months now and use it to wash and scrub dishes? Is running the dishwasher expensive? We have 4 people in our apartment and she insists that we do not use the dishwasher. How much could it possible be a month (extra) to run the dishwasher? Especially splitting it four ways?