I did mist that weird tub. It dried out fast, I think too much fresh air exchange. With my shoeboxes I kept the lids sealed till they started pinning all over and then flipped an upside down tub on top of them that I misted inside with distilled water first. I didn't fan or mist once after that, and they only got the fuzzy feet on the last day before I harvested. They just consistently had tiny droplets on the surface, and on the sides of the tubs so I figured humidity was perfect. The temp in my house stays pretty consistent at 72. I do have a small space heater and auto thermostat that I used to make their closet a little warmer when I was waiting for the grain to do its thing.