This has probably been done before, but I can't be arsed to find out. I've been having an argument/debate with my housemates over the merits of using a dishwasher vs. manual washing up. I'm convinced it's cheaper and more energy efficient to use a dishwasher, but nobody else agrees with me. I've actually been 'banned' from using the dishwasher altogether. Does anyone know of any evidence to back my claim up? What a boring topic.