Maybe leave him a step by step list on how you do things/how things should be done, maybe he'll take the hint

Hehehe, you wouldn't like me then. I don't rinse dishes before they go in the dishwasher and I put everything in there that will fit including chopping boards I'll leave the baking dishes in there until they get clean or DH gets fed up hand washes it cos the dishwasher didn't clean it cos I didn't rinse it
that's me too except DF doesnt wash up or touch the dishwasher, like anything around the house i ask him to do i usually correct whatever he's done wrong/different when he isnt looking