Dishwasher not getting your dishes clean? Give the interior of your dishwasher a good cleaning by running it empty with half a container of Tang. The citric acid will remove much of the buildup in your dishwasher. Another alternative is running a cycle of vinegar with some baking soda in the pre-wash cup. And if the interior still isn’t glistening, run one more cycle with the vinegar and baking soda to top it off.