This is what I have for the moment, I got my 3D printer 1 month ago so I'm still not fully equipped.
I'm also planning to buy this stuff
portable, rechargable dehumidifiers. I have 2 per safe. They're not really "chargeable", they just use beads that absorb heat. You plug them in to heat them up so they release whatever moisture they've absorbed. It's best if you "recharge" them in a different room though, since if you charge them in the same room as the safe all you do is re-introduce the moisture back into the room.
https://www.amazon.ca/Ivation-Renewable-Rechargeable-Wireless-Dehumidifier/dp/B00KO3E9A0
they make these things that collect moisture and don't require electricity. something like http://www.damprid.com/
Probably in FL windows open wont help much since the air is extremely humid either way. Might also look into mini dehumidifier such as http://www.amazon.com/dp/B00KO3E9A0?psc=1