On my topside teak, unfinished including decks, I use TSP when mold or mildew starts to appear. If it becomes irritatingly frequent I treat the decks with Boracal, a mildewcide.
Mold and mildew hasn't been a big problem below. I use Murphy's Oil Soap to clean the woodwork a couple of times each year and wipe with a Swiffer pad in between. Any growth anywhere gets hit with vinegar.
sail fast and eat well, dave
beware "cut and paste" sailors.
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