Hmm, interesting. I didn't think the recipe would matter, previously didn't have issues with random ingredients haphazardly mixed up into my electric iron (which was non-stick and no longer with me). FWIW, the iron was stuck closed and I had to use some force to open it up.
This iron came with three recipes, I can try the one that doesn't call for a small bag of barm; I know what barm is, but I thought it was measured by volume, not bags. Otherwise, I'll search eg for recipes or go to my local library for a book. Google searches have gone way downhill, nothing but ad-driven and AI generated content