I finished my cooler bator and I can get it to stay right at 89 but the humidity doesnt go over 80%.
I have the vermiculite perfect as well.
Any tips?
How much water to medium do you have?
Are you doing substrateless?
I would add some extra water to the egg tub or keep an open bin of water directly in the incubator.
I really never measure the humidity. I do use light grate over vermiculite and soak the vermiculite really good. I use the cheap sterilite 6qt tubs with no press n seal and no holes in the tubs.
Never had a problem sometimes I think we over think the whole process.