i always offer a little at a time.
Orange slices
Carrot
Apple
Melon
Strawberry
Cooked egg yolk mixed with my own dry recipe
Dog food with rabbit food, grinded and mixed
Just make sure you have a set scheduel so you know you're not over doing one thing.
I never mist my dubia.
I keep them in a dark closet, with a red light over them, and a small heatpad underneath the bin I keep them in. Tons of egg crates, paper towel rolls, fast food cup holders, crumbeled up paper.
I never let the bins get over crowded.
Feeding them orange slices, in my experience, gives their close up odor a more citrus smell to it. Not as bad as their other scent with the other foods :]