So, our guy won't have anything to do with a water dish. After months of keeping a dish in there and filling it and knowing that he never uses it, I'm taking it out. Since he never used it (that I know of and I've taken time-laps of him throughout the day), it's not different now than before, but I'm just more conscious of it now.
I do spray his salad in the mornings with water, but other than that I don't do much. He eats mostly roaches, along with collard greens and butternut squash.
It is my belief that spraying spring water on her greens and, the moisture in the insects is enough. My dragon has always been well hydrated this way. Unless I am missing something, this will not change!