I can be reasonably sure our dishwasher does a good job because Molly the Dog has no interest in licking the plates once our dishwasher has been run.
Not that I offer them to her as a test or anything. It’s just that I don’t have to push her big dog head away from the plates like I do when I’m loading the dishwasher.
Another reason dogs add something to your life: They are cleanliness testers for your china.