Lil late to the thread. Sorry for her condition Al. Hope it all turns around for the best.
I also keep my Bradys at a lower humidity (35-45%) and with less misting,keeping a close eye on urate. Its always white and healthy looking!! These guys are reallllllllllllly small and if you do one really nice misting in the early hours of their awake time they will drink enough to get them through the day. I do another very light misting 2 hours or so before lights out to help hold the humidity during the night ( granted there are no health issues, this should work well to keep them hydrated and not risking a saturated enclosure). I have also went a step further after i notice that they do tend to poop on the leaves of the plants, the same plants that they drink off of.
I have gotten into the habit of rotating out enclosures weekly. While they are using one enclosure, I pull the plants from the previous and wash them and clean all visible poop. Then they move back to this cage the following week. The swap cages are set up as close as possible to each other.(Same type of plants and branches etc). I usually use this swap time to take weights and measurments.
I believe this keeps bacteria down and the risk of the Chams ingesting anything harmful. So far so good!