I have two houses, two Bosch dishwashers, both stainless, and only one stinks if I use the normal detergent. A fishy like smell that you can smell in glasses. The only difference is the stinky one is on well water full of minerals. Running a cleaner helps for a while but I have found that using Lemi Shine detergent and or booster helps too. It would be interesting to know if folks with a unsolved stink problem are on well water or other mineral laden water. Is it possible that there is an off gassing chemical reaction between the minerals in the water and the dishwasher or the enzyme detergent?
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=== Update (12/04/2020) ===
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For Bosch dishwasher. I saw a solution posted in this forum in 2016 but missed it. I tried everything. I had to install a new control unit several months ago and decided to seek out the odor problem too. I have always cleaned the bottom filters regularly but couldn’t disassemble the stupid round filter. It always looked clean but it is two layers. I finally pried it apart and even though the surfaces you could normally see were clean, the inside was filthy. Cleaned it up, snapped it back together and haven’t had a smell since. It is a pain to get apart and I thought I might break it but it really needs to be disassembled and cleaned. That is probably why the Hydrogen Peroxide and cleaners probably worked for a few days, probably killed off the bacteria in the filter temporarily. If you have smell and have one of these cylindrical filters, take it apart and see what you have in there.
I have two houses, two Bosch dishwashers, both stainless, and only one stinks if I use the normal detergent. A fishy like smell that you can smell in glasses. The only difference is the stinky one is on well water full of minerals. Running a cleaner helps for a while but I have found that using Lemi Shine detergent and or booster helps too. It would be interesting to know if folks with a unsolved stink problem are on well water or other mineral laden water. Is it possible that there is an off gassing chemical reaction between the minerals in the water and the dishwasher or the enzyme detergent?