
1: Leather.
It mildews rapidly unless you're airing it out constantly.
Here are CA's gloves that we wore last winter as we worked the boat south.
These were bagged to prevent them from getting wet in their storage locker.
Whatever spores were in there loved the dark confines.
Many of the clothes are in our apartment now. The rest should probably be laundered as part of winter layup.
I think all of the shoes and boots are off the boat. We kept some nice-looking shoes aboard in case we had weddings for funerals to attend. They didn't fare so well. They were rarely worn, and suffered from some mildew. They were shoes, though, so hard cleansers work out fine.

The paper books are bagged. But I'm starting to think that they may all benefit from some airing out while Red Ranger sits on the hard.
Plus, there are some tools that might be helped by some oily wipe-down.