Hey! I'm a poet and I didn't know it!

I'm having trouble adjusting the humidity in my tubs. My humidity is causing condensation in the tubs, which in turn makes the substrate (paper towels) wet. And I'm talking wet, like soaking wet, not damp-from-misting wet. In each size tub, I have holes at one inch intervals along the long sides of each tub. Each snake's water is not over the flexwatt, and is in the furthest corner from it.

I've got the temps right where I want them so I'd prefer not to add more holes to the tubs (but I will if I have to). Any ideas on how to balance things out a bit?