Marie, hospital underpads are the best! I learned this from the Ferret Nook and now use them in my own cages. They can get pretty filthy but wash well in the HE washer. I do find it helps to scrape off heavy soil ( poops) and the spray the heavily discolored areas with Clorox Cleanup and also use bleach in the wash. I used to buy from someone who had an eBay store selling used pads but he's not there anymore so have tried from a different vendor. It sure beats buying them new. Another thing to use on the floor would be a double thickness of flannel sewn together or a piece of mattress pad with hem binding sewn over the raw cut edges. Carol J. Owens [Posted in FML 6591]