People say they put towels under the fleece, which is good, but in my experience, towels make the smell stronger. I just put fleece in the cage. But you have to spot clean with a mini broom shovel thing, twice a day-in the morning and at night. And you have to change the fleece at least once a week, maybe two times, if it smells really bad. I also used a special paper bedding thing, but I didn't like it because it would smell, was hard to clean, left stains, and after a certain period of time, would start to mold which was disgusting! So, in my opinion fleece is the best, but it's what you feel like. I've tried fleece, bedding, and a combination of both, and I liked fleece best! The other thing that I like about fleece is that there's so many colors and patterns! Hope I helped! =)