Re: Mildew in the Cabin
The big thing for me was finding the source of moisture in my boat. I had a persistent small puddle of water on the floor of the head that took me months to track down. It turned out to be a very slow leak in one of the hot water heater lines that would drip a bit as long as the system was pressurized.
Once I fixed that I got a very dry boat and mildew stopped being an issue.
I did wipe down all of my hard surfaces with a tea-tree oil containing spray. I mixed in another ounce of pure tea tree oil (not cheap stuff) to make it stronger. I like how tea tree oil smells, so it at least made the boat smell nicely and killed existing mildew, but I can't say if it did anything about new mildew.
We do sail it about once a week, that helps.
1986 Pearson 28-2 "Elena"