How do you hold on to steady humidity for lizards?

I have a chinese hose dragon and i know the humidity is suppose to be at 80%. I have it at 80%but i hold to keep misting the reservoir. how do you keep steady humidity?
Answers: you can also buy a fogger. this will supply a steady flow of fine mist, keeping the humidity, you can buy ones for use beside waterfalls too, it's easier than save misting but they might cost about 30-50 depending on the size. you could also buy a point called a dripper, which drips wet out slowly, keeping humidity up, or you can use an upturned polastic bottle filled near water and it lid punctured slightly, so it drips when put on the side of the container, but this dosent look so good.

hope this help :)
sealed reservoir...ample water

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