I use Aspen, I used to use paper towel but I was constantly changeing the paper. I was gauranteed that within 5 minutes of returning the snake to its container there would be some pooping going on so I would have to clean it again.
With the Aspen, it looks nice they can borrow under it and it is very easy to spot clean,which I do constantly. I dont know about never having to clean it. I do a major cleaning once a month. It is fairly cheap so thats not a problem.
Jimmy C.