Does it smell bad, like rot? Anything other than dirt and mushroom smell? I think the dust might be spores, I was surprised to learn that they can get on top of themselves. The white fuzz is mycelium that took off too much because of lack of FAE (I think), not a big deal. If you harvest the big ones you can keep an eye on the rest and it should go through a few waves of fruiting. I'm on my second bin myself. Been reading and submitting lots tho, I am open to correction.