There are a few ways to use baking soda in your dishwasher. One option is to simply sprinkle some baking soda over the bottom of your machine and anywhere else with visible dirt or food stains. You can then run a normal cycle using hot water and heavy-duty dish soap.
If the inside of your dishwasher seems particularly dirty and you want to perform some maintenance, you can add several tablespoons of baking soda and then run a cycle with an empty dishwasher. This will help sanitize the machine’s interior and eliminate any lingering odors.