I use Eco earth because it helps to hold humidity. I have some cypress mulch mixed in to give it a more real feel. My BP seems to love it. If you have a screen top use a warm damp towel to cover the top and raise the humidity.<---- I use to use this technique. That with regular misting if your in a really dry area. You also have to watch out that you don't wet the soil to much to avoid scale rot and i believe respiratory problems. The humidifier is really the way to go though because it takes all the work out of keeping the humidity right.