Hard to tell because I had mine in a ventilated tub for months while I experimented with using ink-less newspaper as a substrate. I've since gone back to using the ReptiChip and have two enclosures (one with a couple of UTHs and another with an RHP) and the RHP really dries out the substrate. I would wait a couple of days to and see if the humidity drops. As long as it's not wet with condensation in the cage, you should be fine.