I just had my very first ever chick hatch!! Perfect timing - I have to leave for work in 15 minutes!!! The humidity shot up to 75% - do I leave the red vent plug out or in? Is 75 too high? I won't be back for 5 hours. If I leave the plug out will the humidity drop too much in 5 hours? If I leave it in will the humidity be too high? Help!!