it has been a thought of mine as well. My concern is that I could then cause shrink wrapping. I would hate to lose chicks for another reason - although one they start pipping the humidity with jump on its own. Hoy Vey.
One day when I am old and retired I will do controlled studies on all the theories I have.
I frequently neglect to raise humidity for hatching as I often end up hatching in the bottom of the big bator (know I shouldn't) .
Generally find that as long as I am not opening the door all the time very few fail to hatch. It seems that that opening the door is the biggest cause of shrink wrap.