I recently converted my yellow topped incubators with Incukits (see Franken-bator link in my signature). I'm having issues keeping the humidity high in one of them for hatching. Before conversion, it was hard to see because of condensation sometimes and it used to take 2-3 days for the sponges to go dry, now they are drying out in a day or less. I have 3 sponges in a dish with water, but that isn't raising the humidity enough (55-60% humidity) I'd be happier with 65-80%. I did open one hole in the top for ventilation, I'm wondering if I need to close that off....