I use a reptifog, fogger by zoomed. If you cover part of the screen top and run the fogger on a timer it will do the trick, and raise the humidity. Mine went from 20- 60% since i adjusted the intensity of the fog and the times it goes on. I got mine off the Petco on line store because, if there is a problem you can return it to any local petco in your area, but mine works great. The only change i am making is a larger water botttle, as the top is the same size as a soda bottle, so it will hold more water. Always used distilled water in these units. Exo terra makes a multi tank fogger, and it comes with a timer, but its twice the price. Good luck.