I was definitely thinking of adding more moss to bulk up the layer of coco husk and hopefully bump up humidity. I'll try the damp rag under the foil as well, thank you!

I'm planning on removing the excavator clay in the future anyway, as even if it isnt drying it out, it's also serving pretty much no purpose for me at the moment. The cold hide is formed with it, but I have an extra hide that I can replace that with.