When you put your leaves in the kiln with too much humidity, it let yeasts and mold develop.
I had some batches with clearly too much water and the leaves ended covered with some sort of dust, smelling very nice, like some baker's yeast.
And of course, some ended with mold... which is less good
I had some batches with clearly too much water and the leaves ended covered with some sort of dust, smelling very nice, like some baker's yeast.
And of course, some ended with mold... which is less good