If 81 Is the ambient thats fine. You don't want the whole environment to be 92.f. Just one area. The hotspot. I break the tubs into 1/2s. Hot side /cold side. Hot side had a floor temp if 90-92. Cold side usually will have the same temp as the ambient. 80-85.
Your humidity very well could be 70%. That's not too bad. You could try adding some ventilation. If it says 70 and you see condensation you'll need to add holes. I have a feeling though your hotspot is much too hot and that's why you have such high humidity. Any heat needs to be on a tstat or dimmer 100% necessity.


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