Hello Momoffour,
Water is one of the stranger care points for beardies. On one hand, most people don't end up offering water regularly and have no issues. On the other hand, dehydration is one of the more common health issues that often goes undiagnosed.
Usually I keep a water bowl in Guac's cage with him, however I don't right now due to the fact that he is in a smaller cage than normal. Water bowls can raise the humidity to unsafe levels if you're not careful, and many dragons won't drink from them. Mine does, which is why I normally offer it, but since yours doesn't I probably wouldn't give them one.
Personally, I don't like the idea of "spritzing" your dragon. If you do it in their cage, you are liable to get water in there, which may lead to humidity and molding problems.
Do you give your beardie bathes? Generally, if you give them a
bath 1-2 times a week as younglings and 1-3 times a month as adults, they'll be fine with just that, provided you offer fresh salad daily and gutloaded bugs regularly (daily for juveniles, 2-3 times weekly for adults). If you need guidelines for how to
bathe a dragon, let me know and I'll see about putting a guide together for you or linking you to a good article/previous post.
Best,
-Ellen