incubator is set up

[smeagel]

Ok, I set up my incubator as per Jeff's recomendations. A rubbermaid lined with styrofoam and a plastic lineing over the styrofoam. I watched Dr. Sewards video and the Sutherlands use a piece of glass as the top of their egg box. My question is could i use the glass as the top of my incubator as well or will the heat loss be too great thus making the incubator heat source work too hard. I would like to be able to look at the eggs withou opening the incubator lid and loosing heat, again making the heat source work too hard. Any suggestions or opinions would be appreciated. Thanx.