I came up with this idea awhile ago, and thought I'd share it. It works AWESOMELY.
If you've ever lived with others (as I'm sure you have) and also have had a dishwasher, you've probably experienced the issue of not knowing whether the dishes in it are clean or dirty. You put away dirty dishes, or rewash clean ones. It's easy to screw it up.
My simple fix: I lodge a shot glass in a container in the silverware compartment. When the dishwasher runs, the shot glass fills up with water. When I empty the dishwasher, I dump the water out of the shot glass and replace it in the silverware container.
So it's a quick check! Shot glass is empty: dishes are dirty. Shot glass is full: dishes are clean.