Oh my gosh! This is interesting. We have four of the desert hairy's all living in one enclosure and we have a small dish (a barbie doll punch bowl) that we fill with water once per day, they have been drinking it. We've had them for about a year now and so should we stop giving them as much water?I'm a bit skeptical that there are threads that suggest high humidity for desert species. Are you sure you didn't accidentally enter a thread discussing the Heterometrus species (Asian forest scorpions) or some other tropical type of scorp? If somebody posted that desert species require high humidity, there would be numerous responses correcting that, I'm sure. There has been some advice to dampen a small area slightly infrequently and provide a water souce now and then, but that should not result in high humidity.
I only keep one arid species, Hadrurus arizonensis (Desert Hairy scorpion) and the prevailing belief is that they get enough moisture from prey to make frequent watering unnecessary. I put in a bottlecap of water once a month or two, but that doesn't raise the humidity enough to make a difference in my belief.