What i do is mist the aspen right after i change it to get rid of the dust. Then i usually mist it once or twice a week in the winter. I've never had it mold and it even got soaked from Luna plopping her big bottom in her water bowl and flooding the cage.
And yeah, aspen is much easier to work with imo than the coco stuff. The coco stuff does hold humidity well but from what i read on the chondro boards which seems to apply to all snakes really, is that as long as the snake is hydrated by drinking water, they really dont need to live in a constant wet cage. All that does is create an awesome breeding ground for bacteria, fungi and mold. All of the chondro guys seem to mist and let it spike, then let it dry completely out down to around 40% and then spike it again. Recently that is what i have been doing with all the snakes but mostly because i have been lazy and havent been misting their cages lol. They all seem fine and Rosey even had a perfect shed and her humidity has been around 50%.
Caesar sometimes gets a piece or 2 of aspen stuck in his throat here and there. You hear him coughing, then he goes over and takes a huge drink of water and is fine again lol. I try and feed everyone on cardboard now but half the time they drag it off and through the aspen
