I'm not sure what you leave on your dishes, but generally it's just a few crumbs, maybe a bit of butter, if it's obviously too much for the dishwasher - oatmeal

I'm not sure what you leave on your dishes, but generally it's just a few crumbs, maybe a bit of butter, if it's obviously too much for the dishwasher - oatmeal does get as hard as cement for example - you need to rinse it off first anyway.