I was fed up with continually trying to clean out under the 3X4 so I changed the bottom slightly and removed most of the top. They seem to like it! I also changed to fleece as an experiment. Me and my mum were fed up with the mess from the bedding. I am currently trying to find a different way to have my hay as one of guinea pigs does not like jumping in and out of the hay box. (Even though there are bricks to help!) I also have Spencer upstairs waiting for the 4weeks period so he can live with the girls!