I have a solution, the aforementioned tub setup (which he is not moved into yet). Problem is due to some snafus (was switching from coco powder to coco chips for the first time and added way too much water) I've run into the opposite issue where the humidity is so high it goes beyond what my hydrometers can read. Even leaving the lid off and periodically sifting the substrate around to expose all of it to the CHE hanging above hasn't really done anything, it's still so soaked almost a week later that squeezing any given chunk produces entire droplets of water.
Really don't know what I can do to dry it out. Bake it or something?