When you mist you want to make sure her plants are nice and wet, perhaps mist for at least a couple minutes each time. Adding a dripper might be a good idea too, so she has water while you're not in the same room.
And finally, make sure that her food is well hydrated. So feed your crickets fresh frits and veggies, because they'll definitely gain moisture from their food too. And food like silk or hornworms are loaded with water, so those are great worm to throw into their diet.