Yep! And remember, when you get eggs in them, and they start moving around... that is going to create heat too. *More towards the end of incubation of course* Also, in the past I had a problem with keeping humidity up with substrate... Now I LOVE to see 100% or HI humidity on the stats! BIG fan of Press N Seal right here! I'm also suspending over pearl-lite and water for the 2nd year... and I love that too! If you are reading 95% before the eggs are in there, I would defentlly consider using some P & Seal!