Hi,

Typically I try not to put any holes in the egg container. I open it once a week or so for air exchange and to wipe down any excess moisture off the lid. I do have a hole on the lid of one of my egg containers so I can place a probe for a digital thermometer to make sure the temps are good. My fan runs 24 hours in the incubator since it's pretty big and needs the air movement to stay constant.

Hope that helps.