Hi everyone. I have a 40 liter 670x350x270mm polystyrene coolerbox as a still air incubator. The temp. is a constant perfect 100*F. But my humidity is 20%,and still declining. I would like to know what I can do to make it reach 40% and then 60% the last for days. I have already put in a plastic cup with 50ml water,but it's not decreasing at all. I don't want to cut more holes in the box,because I want to keep that temp!!! So what must I do to increase the humidity,put in a bigger bowl with more water or what? Thankyou? NOTE:This is for quail eggs.