I opened the lid of my BeeThining TBH today and noticed what looks like the beginning of mildew on top of a few of the bars. Nothing major, but certainly some light grey dappling.
Was wondering what, if anything, I should do about this? A few of the affected bars have comb on them, but others are unoccupied, so to speak. Does the mildew pose any threat to the colony?
I did apply a tung oil finish to the hive when I got it last summer. Guess it’s time to recoat when the weather warms up?
Also, living in Portland, I’m not sure what else I can do to keep the hive any drier than it is…