Sorry big time difference to the UK,
That temperature looks a lot better and he should be better off that, hopefully the humidity will stabilise it's self and as already said as long as there isn't water droplets firming on the roof and keeping everything moist it should be fine, the extra vent will help with this
I keep my nics 88-90 so should be fine and they pretty much in the cool side most if the time except after a feed normally



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