i mix my stuff in a small trash can and leave the lid off, and mix it periodically. it will dry out (meaning more watering when dropping plants) but will prevent mold, especially with mixing it every other day or so
mine is on its 22nd day of sitting today.. I had it in a trash can semi covered.. Today I took it out and mixed it about on a tarp adding some more myco inocc. and mixing it in.. I covered it with another tarp & will begin to use in 1-2wks.
if you see some white fungus looking stuff forming on the soil that is a good thing.
lid off or on doesn't matter there is enough air in the soil. needs to only sit for a week or too wet. then it can be died out bone dry and stored for a long time b4 it will need reinoculated. dead organisms will reanimate with water and plants. if you over due it with mold growing and what not its not bad but can result in nute burns and premature decay of nutrients in soil. i have not read about super soil this is just how i learned to make organic soil.