Our house has a Dishwasher Fairy. I know this because I drink a lot of chocolate milk. I like to re-use my chocolate milk glasses for a day or two, so I rinse them and leave them on the counter until they're really in need of a proper washing. Think of it as a way to season the glasses between beverages. From time to time, one of my glasses will be captured by the Dishwasher Fairy and loaded ito the dishwasher well before its appointed time.
This is just how things are.