The spray will also raise the humidity of the cage. Use live plants instead of artificial ones to keep the humidity up. Breathing humid air is important for your pet's lungs. Don't keep the cage wet all the time as molds can make your pet sick. Some pet stores sell water drip systems or you can make your own.
Chameleons are shy and slow-moving.
They are easily startled and need a quiet place for their cage. They have very sharp eyesight but poor hearing. Because handling and petting causes them fear, they don't make good pets for children. To a chameleon, you are the predator. If their captive environment is too different than what they are used to in the wild, they don't adapt, they die.