I've recently been using only cypress mulch for my BP my issue is that it dries out really quickly and when it does I've noticed the heat from the mat doesn't rise through, when it's damp I can lay a hand down and easily feel the heat. Should I be continuously spraying the mulch keeping it moist, do BP keepers normally do this or is there other methods. I used to mix the cypress with coconut fiber but I think I stopped after researching that the Coco fiber could possibly cause respiratory issues. I'm thinking of switching to Aspen thinking maybe the heat can get through that easier or maybe he can more easily burrow at least to get closer to the heat source. What does everyone else do to their substrate and what do you use?