Nice snake.
I would switch over to astroturf. It holds moisture pretty good, and you can have two pieces cut to fit your cage, so that when one is dirty, you can just clean the cage out and replace the soiled one right away. I used to toss mine in the washing machine, but they get pretty frayed, so I would soak them in a 10% bleach solution in a bucket and then hose dry. But now I just take the easy way out and use newspaper.