I think my washing machine is a bit stinky. Might try one of those washing mashing cleaners. I’ve done vinegar washes before that have some success, but maybe the proper stuff might be more thorough? I always leave the door open after washing so it dries out, but for some reason it still get musty over time.
Leaving the door open is exactly what you are meant to do. But you should also leave the drawer open and give your seals a dry after you've finished with it for the day. I use and old tea towel.
Once a month get a sponge and soak it in vinegar or disinfected. Give the drum, seals, drawer and door a wipe over. Chuck the sponge in and run the machine for a hygiene wash. Dry it over when it's done.