How do you remove mold from tongue and groove pine ceiling?

We built our large, screened, back porch about 5 years ago and the ceiling is tongue and groove knotty pine. Last year we added a hot tub and have used it a lot. Now I noticed that we have mold growing on the ceiling. It's not too bad yet (my husband can't see it but I can) but I imagine it will only get worse. What can we use to remove it and prevent it from coming back?
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Vinegar will kill mold spores, bleach will not. You might consider painting the ceiling to have it easier to wipe down when necessary.
https://www.homedepot.com/p/Concrobium-32-oz-Mold-Control-025326/100654126
we used this on surface mold in our basement
And with out ventilation you will continue to get mold because of all the moisture.
Maybe install a ceiling fan to get some air going in that room. Cannot use a dehumidifier I guess due to the hot tub