I am unsure about question one, I have noticed mine making small squeaking noises sometimes when they exhale, I think this is normal. If you notice happening more regularly or getting worse then it may be something to consider. As for question 2, you should stop soaking your BP every shed, and only do it if there is retained shed that needs to be removed with your help. They have oils in their skin that help them shed, and soaking them washes these away. I guess the stuff in his nostril could be skin, do you have a photo of it that you can post? Hope this helps