I am going to hatch in my new Brower Top Hatch, and wondered if I should open all the vents. I like lots of ventilation, and am incubating with all vents open (in my Brinsea Octogon 20 Advance) and just add wet sponges to compensate for the loss of humidity. I have a digital hygrometer to keep an eye on levels in the Brower during hatching. Is there some reason I should only open 1 or 2? Is it difficult to maintain enough humidity? Before I got my hygrometer and I was using a different incubator I had to help some chicks who were shrink wrapped. It was traumatic for me, though they all made it. I want to avoid that scenario again! I just got the Top Hatch today and I'm just setting it up now. Any advice is very welcome! (And I soon may have to incubate as well as hatch some of my eggs in it, as I might have too many coming at the same time!) Thanks!