I've had the same problem with my baby Veiled. He hates misting. I've tried warm water, room-temperature water, and even cool water. Makes no difference.
Tried a normal spritzer type sprayer, and a pump-sprayer at various levels from very fine mist, to a light shower. Tried spraying it above him when he's under leaves, spraying it under him when he's basking, and off to the side so that it doesn't come near him.
Either way, the minute he senses the water (especially when drops land on him), he scampers away as fast as any other lizard, off the branch of a tree and onto the mesh on the side of his cage, where he climbs into the top back corner.
Then he sits there for ages after I've gone away. Even though it takes him seconds to get up there in "fleeing from danger" mode, it takes him hours to get back in "Chameleon leaf-walking mode".
I've kept up the misting despite his reaction, and I also keep a drip running most of the day in his cage, but I haven't seen him drink from any of the leaves it wets (I am at work most of the day though). I worry about his hydration, but his urates still seem quite white.
He drank quite a bit off the leaves after I sprayed him the day I brought him home from the reptile show. But since then, I've only ever seen him licking up drops once.
Will he eventually get used to misting? Will he make use of the dripper if he gets really thirsty?