When I first got mine, to clean it out before I tested it with dishes, I wiped down the inside and the seals, then ran three cycles:
The first cycle I ran with Bubble Bandit. After this cycle, the dishwasher looked new inside.
The second cycle I ran with just a large cup of white vinegar...
Congrats on the KDS-58!
Dishwasher twins! It's a great machine. I hope yours is able to provide the same joy that mine has brought me. You're definitely in the right place, with help from experts to get yours back to work.
I recently got a KDS-58, and made a video about it. I've wanted a vintage model for a long time. I'm still learning about the machine (not a dishwasher expert by any means), but so far I can safely say it's one of my favorite purchases ever.