I have three VE's and a couple of other digital brands. As I've posted before, readings are all over the place.
I just ignore them.
It is pretty much a given that humidity will be too low in winter. I provide moss trays for my little guys to dig in, and a humid hide for the larger corn. All three enclosures get misted twice a day.
A humid hide for a BP should solve the problem; whatever the actual humidity is, the animal can self-regulate.