Misting is okay but it's not the best way to get humidity up for red foot torts. Our redfoot are easily get a fungus on the bottom of here shell...shell rot. The key to it getting this is to find a way to keep humidity up but keep the top layer of multhc or soil dry. When you mist you're getting everything wet.
What seems to work best is a two layer sub straight like Zero Pilot mentioned. What most of us have the best success is to have about 2" deep of cypress mulch on the bottom then covered in an inch or two of just plain top soil. Then instead of misting with a spray bottle you can take warm water and pour it into the corner of your enclosure. The water will go down and get absorbed by the mulch but keep the soil dry. The Che will heat up and bring the humidity up.
What seems to work best is a two layer sub straight like Zero Pilot mentioned. What most of us have the best success is to have about 2" deep of cypress mulch on the bottom then covered in an inch or two of just plain top soil. Then instead of misting with a spray bottle you can take warm water and pour it into the corner of your enclosure. The water will go down and get absorbed by the mulch but keep the soil dry. The Che will heat up and bring the humidity up.