I am going to expand the Wheekers 2x4 into a 3x5, and since my children are the ones who clean the cage I was thinking of ways to make it easier to clean when they won't be able to reach all the way across anymore. We use pine shavings because we couldn't make fleece work for use. So I was thinking I could use a simple cotton bed sheet as a liner in the bottom of the cage, and the kids could then just lift it out and empty it into the garbage. Should work well, right?