You’ve done the hard work. Don't let it return.
While you have the machine pulled out, check the drain hose routing. If the hose droops down and then up to the disposal, dirty sink water flows back into your dishwasher. how to clean out a dishwasher drain exclusive
For an extra layer of protection against clogs and odors, consider using a dishwasher drain maintenance product, such as a drain screen or a microfilter. These products can help catch food particles and debris before they enter the drain, making cleaning and maintenance a breeze. You’ve done the hard work