I've been using tissue paper with paper towels on top for about 2 weeks now. The carefresh was super messy, plus with them being on my computer desk I've been cleaning the cage out at least 3 times a day to keep the smell down. Well just a minute ago, Mumble who is a little over 3 weeks old now just ate a piece of tissue paper. Is that going to cause a health issue? I wasn't quick enough to grab it away from her/him. I don't have old towels unfortunately so should I change what I'm doing for the bedding. What should I use?