So, we are experimenting with lower heater settings at night and increased ventilation. We're clearing out crammed lockers and going through a lot of vinegar. We try and keep as much moisture out of the boat as possible, but it drizzles a lot in Victoria and with four wet bodies going in and out... We may buy some Golden Rods or a dehumidifier (or both, please leave a comment if you have experience with these). There are more extensive insulation-related steps we could take to mitigate the problem, but our time in these northern lats is relatively short. But we’ll see, we've only dipped our toes into the winter ahead.