We learned that when we use bins as a mould 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 mould on them. We tried to cut away all that we could see, unfortunately on some spots, it came back. The samples that were too mouldy 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.