As for excess humidity, look at some "Humidity Beads" Here>> LINK


These not only provide humidity, they also absorb excess, maintaining a stable environment. use the "Calculator" found on the left-hand column to determine how much you need, then buy about 20% more.... More is always better!

I would also recommend lowering temperatures. 80* is way too warm, and you are in serious risk of a beetle outbreak. If you get a wine cooler, you can purchase an aftermarket temperature controller that will allow you to set temps at a broader range. Sensor goes inside, and fridge plugs into controller!

Dennis~