I don't have any grow logs here (yet), but 70-85 RH seems a bit steep to me. Different people like different humidity levels for different reasons; temperatures, C02 usage, etc. Personally, I keep mine between 40-60 during most stages of growth. Any less than that and it seems to affect the growth and health of the plant, any more (at least in flowering) and the buds seem to be much more susceptible to mold.

Just my :twocents:, for what it's worth.