We learned that when we use bins as a mold for the material the bottom can get clogged with moisture and get acidic. So we should flip the bins every 3 days.
Also most of the tests had some green mold on them. We tried to cut away all that we could see, unfotunately on some spots it came back. The samples that were too moldy we have had to throw away, the others we put outside to dry out on the surface, while on the bottom the mycelium can continue to grow.