I can't remember what post it was on... But if you've tried pretty much everything else for your humidity seriously try adding a ventilated cloth bag of long grain rice in there ( I have enough room to hang it from the top of mine)... Rice absorbs quite a bit of humidity and you can just add more or less if it's not doing the trick, or is absorbing too much you just remove a bit.

Another thing I noticed though, (I went back to your old set up photos) the dry drift wood logs and aspen can hold a lot of humidity - especially since they are both untreated wood (which means they don't have chemicals added to keep them from absorbing water)... One other thing you could try is adding less substrate, and see if taking out the driftwood makes it any better for a little bit. If the driftwood seems damp at all or if it's not at least a bit rough and very dry feeling to the hand then it might be over saturated from taking in too much water when the tubs were really humid...

I know as a kid we would bake pinecones to get the humidity out of them.... Can you do that with driftwood to dry it out as well???