Don't block the spinny thing. Don't leave anything where it can fall through onto the heating element and start burning. Make sure things can't flip over and fi

Don't block the spinny thing. Don't leave anything where it can fall through onto the heating element and start burning. Make sure things can't flip over and fill with nasty greywater that sloshes onto everything else. The number of times people have done me the "favor" of loading my dishwasher and broken these rules has made me sweat it too.