It sounds to me like your home is a higher Humidity than most. My home is 30-40% so my enclosure with a large bowl is 58-62.
Yes 85 is to high. During shed 70-75% is ok, but then needs to return to a average of 60%. Test your house/room for a hour and if your room Humidity is what the snake needs you'll have to find a way to vent without hurting that sweet enclosure.
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