Well calm down, your 50-55 humidity is just fine. What i do is when i notice they are going into shed, blue/grey eyed twice a day i grab my lil spray bottle. I mist the cage a lil and i spray the snake. I do this everyday until they shed. Never had a problem. Scale rot can come from it being a soaking wet enviroment not just a lil misting, it is also a form of bacteria i heard. So a clean cage and some misting works just fine for me.
I thought spraying the snake during shed is a bad idea...
