I have a homemade incubator and have been testing it the last few days. I have the temp and humidty right.. but when the lid gets opened the unit lowers in temp and humidity. I plan on hand turning my eggs.. will this be a problem - if the temp and humidity lowers every time I turn them? Also, does my incubator need to have vents open before the hatching? I put some in but when they are open the temp drops low. What about the tiny spaces left in the cord holes I drilled is that enough? Then there is also the air coming in when I turn the eggs. Want to figure all this out before I get my eggs.