Don't know how detrimental it will be that humid (though watching them dance up off the substrate lets us knwo they sure don't appreciate it) - I am aiming to recreate the arid non-humid near desert conditions for this species - there are indeed a good number of trpocal tarantulas needing high humidity but every reference I can find urges dryness - they hail from the borders of the Atacama desert and maybe occasionally if they are lucky they will get moisture form a bank of fog rolling in.