Art, I find it strange, aslo. Especially, since all of the billets had been in the house for at least a week to begin with. The only thing I can think of is: our house is very open with a vaulted ceiling, except my office where the billets were. The themostats regulate tempts for the open area of the house. When my office door is closed, it's the house room in the house because the heating units are trying to heat the large area and my office really doesn't circulate heat anywhere else. If the door was closed to my office for 3 days, it's possible that while the rest of the house was 68 degrees, my office could have be 80 + degrees with no circulation of moisture.