Working the line, I've noticed that the cockpits on challengers look like a sauna when the pilots are doing the preflight and the airplane is sitting on the ramp. I walked into the cockpit of one to ask the pilot how much fuel he wanted and there seemed to be mist everywhere. They appear misty/steamy from the outside looking in, too. Anyone have an explanation for what's going on here? Is it some kind of air condtioning method?