Maybe I'm bad, but I don't even really keep track of humidity for the balls, because they're in a rack system or tubs. For my colubrids in the tanks, I mist once a day when they're going into shed, and with the balls (because I'm lazy) I just spill a little (a LITTLE, like two tablespoons) of their water bowl onto their paper towels once a day.Again, just during the shed cycle. Perpetually damp paper towels are never good. Anyhow, I always have perfect sheds, so I figure I must be doing something right.