MY dishwasher had the most awful smell. I tried everything, bleach baking soda etc. Nothing fixed it. I googled it too. I finally figured out that food particles accumulate in the bottom edge of the door. I got some paper towels and wiped it gagging the whole time. It was really gross. Now I clean it every week or 2. Just take some paper towels and clean the bottom edge of the door with it wide open. Hope this helps. It solved my problem.
Pat