RE: Cabins:
I am in Florida so my biggest ally is a dehumidifier. I run one 24/7 when the boat is not in use. Instead of constantly running shore power, I run an extension cord from the outlet on my finger pier to the unit. The clear tubing that comes with it is routed into the galley sink so the accumulated water runs down the drain and out the thru hull. During these periods of inactivity, I prop the cushions up so air flows underneath and open storage hatches, the head door and the galley fridge.
Continuing this concept; moisture is your enemy. We allow nothing wet or damp in the cabin, ever. We cook regularly below and judiciously clean up afterword's. We sit on towels when lounging in the cabin to protect the cushions.
My Sig Other is in charge of the Head, she stays after it with regular cleaning of the bowel and tank and it doesn't smell.
We also air it out whenever possible on nice, breezy days. Anytime, I'm messing around on the Marlin, the cabin doors are open.
RE: Eisenglass:
Imar Strataglass Cleaner (spray bottle.) Pleasant scent..Use with micro fiber towels only. I never let any salt water or stains remain on the eisenglass for very long. Rinse with freshwater first, dry with micro fiber towel, then apply the Imar; wiping off with another dry micro fiber towel. (Note: DO NOT roll up your side or aft curtains after salt spray has hit them on a rough day offshore. Rinse them off beforehand or the salt granules will scratch the clear glass as you roll them up.)
RE: Combing Bolsters:
On the bolsters and seats I use a combo of 303 Aerospace Protectant and 303 Mold & Mildew Cleaner/Blocker, applied separately. Each product goes on every 6 weeks or so. I never let it go more than 2 months without re-application.
I also use a second dehumidifier for the helm area when the eisenglass is zipped down. Go in there after a summer thunderstorm in Florida during July and you'll see why; it's as humid as an Amazon Rainforest. Even though it's not completely sealed up, it's not like dehumidifying the Great Outdoors. The Unit does not run on "high" mode all the time. it will get the humidity down to 45% or so and keep it there.
It is worthy of mention that I keep the boat fully covered during periods of inactivity. If the boat was exposed to the Elements all the time, I would do all the cleaning and prevention much more often. To me, a good cover is worth the hassle, even on our Marlin.
Sorry you asked?