That's exactly why I use paper - when they defectate - it's truly clean each time I change the "substrate". I never like spot cleaning and knowing that there was still dirty substrate until I did a full cleaning. I also didn't like all the aspen on my carpet either.
Yes Robin, Liza didn't like the idea either although she leaves the snake room to me she still goes in on a daily basis and she is more of a neat freak than me