He will shed in a couple days. Snakes go into blue which the blue is actually fluid between their old skin and the new skin. That is why a lot of people advice not to handle them during this time or misting them down as some people say it will actually mess up their shed. Once they come out of blue, that is the time to raise humidity or mist them as the next stage in a couple days is them actually shedding the old skin. He probably is pissy because of shedding. Imagine your whole body itching and stuff, I imagine that whats they go through. My big BCI girl gets cranky during shed and will spend almost the whole time in her hide which is usually the only time she goes into her hide for any extended amount of time.