It's nowhere near that damp here, but I too quickly found that the crystals are just too much of a pain to keep up on. I use "Dry Out", little BB sized balls of calcium chloride that you can get at Bed Bath & Beyond in 1/2 gallon milk cartons for 6 or 8 bucks (the stuff is a LOT more expensive when purchased through sporting outlets). A pint jar 1/4 to 1/3 full of the stuff lasts 3-6 months depending on the season before it all turns to liquid & has to be poured off and more product added. I've seen a gizmo designed for the stuff that keeps the product up high, allowing the liquid to drain to a lower holding reservoir that would probably be more effective for a very high humidity environment.
When Banjos are outlawed, only Outlaws will have Banjos
The Bible is my lawbook. I turn the other cheek when applicable, and spend the rest of my days resisting evil at every front, until I have breathed my last breath.