What are the ways to do the dishes without dish soap?
In washing dishes it is hot water that removes all bacteria's. If you have greasy dishes you need soap to absorb the grease. You can use straight baking soda or powder as an abrasive to remove grease, or salt. Get a basin to place in your sink add water and some vinegar. Once you rinse your dishes after washing, dip them in basin and then rinse with hot water again. BOOM YOUR DISHES ARE SOOOOO CLEAN.
We are just conditioned to think we need dish soap.
Old west and camping way to clean a cast iron skillet or pot was to scrub it with sand and put it bqck on the embers of the fire.
But of course soap and water will limit diseases.... you can get hepatitis from usinga utensil or glass from someone who has it (it's not just a disease junkies get from sharing needles)