What's a wet box?
I've heard of dry boxing!
Well this is my perception of a WET BOX.
It is essentially a humidor that I have ONLY humidification devices ready to boost the rh of "somewhere"
I used to use only FLORAL FOAM with a 50/50 mix of propylene glycol and distilled water.
I find these inexpensive humidifiers do the job of boosting rh when needed.
These are foam filled holders that I use 50/50 first application and then distilled water to add as needed.
Tom