That makes sense and it's definitely something to consider and I also feel that the snakes would be much more comfortable on substrate. Smell hasn't been an issue for me, though. I check in on my snakes several times a day and the moment I notice urine or feces their tubs get washed out with dawn dish soap and get fresh newspaper immediately. In more messy situations (like when my Bloods set off poop bombs) the snakes will also get a bath before being returned to their fresh tubs. I have actually been planning on experimenting with artificial grass/astroturf. That seems like it would be ideal to me. It's relatively cheap and it seems like it would be easy to clean. I just want to see how many cleanings it will stand up to. Have you or anyone you know of ever used it, Sauzo?