Tell your dishwasher to take the day off.
There you are, end of post.
It could be, but I should probably elaborate. Pick a closing shift that is traditionally your slowest, and have your dishwasher take the day off. If the shift is a busy one, this could quickly turn into a trainwreck. It's now everyone's job to get the dishes done, yourself included. There are two jobs that a manager should be willing to do, wash dishes and bus tables.
When everyone pulls together to accomplish the job, show them that you are proud of them working together. After the dishes are done and everyone is ready to go home, explain to them this was an exercise and thank them for taking part in it. They'll probably think you're crazy, but they understand.
Maybe buy your dishwasher lunch for taking the day off!
