For what it's worth....my humidity was pegged at 99% until I changed out my substrate (reptichip to newspaper). Now I have it down in the 80s. What's interesting is that I have two recognized digital hydrometer meters which show a ride range of levels. Both are situated in the same place of the enclosure.
http://www.reptilebasics.com/thermometers/TH-100/ shows mid 90s
and a digital Accurite which shows low 80s.