According to Real Simple, the lemonade's citric acid [the only flavor BTW] cleans lime deposits and iron stain inside the dishwasher.
We once heard KCRW's Good Food host Evan Kleiman report back on the recommend of putting a dirty sponge in with the dishwasher cycle to get rid of bacteria, and when one homeowner tried it in her brand new high-tech, fancy dishwasher... things went horribly wrong.
Has anyone tried this Kool-Aid trick? Did you notice a difference? Or do your dishes have a lemon essense these days?