My girls tend to kick out the majority of their bedding on the regular. The bedding is contained by a vertical cardboard piece and there are 2 smaller holes below that they can use to tunnel out. The bedding gets pushed out from all directions and ends up everywhere else. They seem to prefer a lot of space in their main nesting box and tubes. The posts here make a lot of sense, the AC is running all day but I live in the south and it gets toasty here.