Thanks all.
I had read that the kernels
should be kept on the cob for a bit if not picked fully dry.
From my readings (Martin Prechtel), it seems like indigenous people would store the seeds on the cobs as well.
I guess hanging would have been a good idea. I'll do that next time.
For now I'll probably start shelling the cobs that look like they might still get mold on them.
This variety is supposed to mature fast, so I was a bit surprised that it wasn't dry by the end of September, even though we got a very sunny summer. But then it was a bit of a late planting (mid June) on rather poor soil. So I'm hoping it will do better next year.