We've won the war against low humidity during these cooler months when the heat lamp is going. Our BP's hide on the warm side is a round tortilla holder. On the flat top is a wet paper towel, folded to fit. I pour water on it every morning. Between that and the warmth beneath, condensation occurs on the roof inside of the hide.
Despite the Accurite humdity readings of 35-60, Patriot has had perfect, one-piece sheds all this time, so I'm assuming the humidity inside his hide is just right.
(Over on the cool side is a bowl with another wet paper towel in it.)