Re: Condensation inside sailboat...
You haven't tarped your boat yet? In NY? It may be to late as it's 10 degrees at your place now. Condensation i would say is normal in NY as the temperatures cycle above and below freezing from day to night. If it is well tarped you can crack your hatch for air flow. Before i put mine up for the winter i clean all surfaces with a cleaner with bleach in it. It inhibits mold growth through out the winter. I leave my hatches cracked as well. Investing in a quality tarp will be worth it in the end run.
Like outbound said. ventilation is everything.