its a wet one, its a ten gallon with a cover on top. what u do is put 2 bricks ( something of that size) and put a small shoebox size sterlite bin with a closeable top on the bricks and add water all the way a little bit below the bricks.....post back if u have additional info
If you do it correctly, there will be no need to worry about humidity. The entire thing is 100% humidity. Get your temps right and set that thing up a week in advance to allow it to stabilize. Once a week, air it out for a couple minutes. Good luck!
I wouldn't bother. The sterilite is not air tight even with a closeable lid. I would use a clear glass top for the sterilite instead so you can easily check on the eggs without letting out all the heat.
I used a glass lid for the sterilite container. Once a week I would open the cooler (a glass aquarium is a poor choice for use as an incubator) and remove the glass lid to let the eggs air for a minute or two.