About humidity...once your snake has enjoyed the proper humidity for a while, it should help any old shed/debris in his nostrils either come out on its own or be gently
removed with a little help from you (maybe using tiny tweezers IF you have steady hands-?) It's not entirely true that when it comes to humidity, "more is always better"-
other than during shed, you don't routinely want more than 60-70% humidity either, & you always need to use substrates that while they retain humidity, they never allow the snake to be sitting in excessive moisture that can result in skin issues. BPs are mellow & beautiful snakes that stay a nice size to handle as pets, but they are one of the more challenging with respect to keeping them within heat & humidity parameters to keep them healthy. I keep many other kinds of snakes & have for many years, none of which are this much "trouble".It's helpful & essential to have a forum like this to trade tips to get it right...especially since most pet stores aren't much help.