I like newspaper because it is just so easy to clean the tubs using it. I would recommend 2-3 layers though, since some snakey defecations can be pretty messy.. I just remove the snake, crumple the paper/waste up and toss it out, and then remove the tub to be cleaned with dish soap and scrubbed with a scrubbie sponge. No odor this way, in my experience, except before cleaning and after a big poop!