I believe humidity is one of those things we tend to overthink when keeping snakes. I think hydration is far more important and most snakes get the hydration they need from their food and drinking water. I've had perfect sheds and no RI issues with my ambient humidity ranging anywhere from 30-65%. I have misted my enclosures or added a humid hide on occasion when the humidity drops into the low 30's but sometimes the snakes don't even use the humid hides.