Well, time to let my inexperience shine through...
Thought it would be wise to place my germming seeds (paper towels on a plate) on top of one of my air supply ducts (not vent, just the warm duct).
Turns out that was a terrible idea. In less than 6hrs sopping wet paper towels are BONE dry. Thinking I may have just killed the lot.
I've got more GWK's and SS SCH on standby, but those were my only AVT's