Wow I am suprised I have heard nothing but great things about fleece and started using it myself and absolutely love it. Have you tried putting towels under the mattress pad? For more absorbency maybe. Also is the kitchen area seperate from the rest of the area? I found that when I made a coroplast box , that I put bedding in , for the area where the hay , water bottle and food is the poops arent as bad on the rest of the fleece. It also seems that since the box has there food and water that is where they pee and poop mostly so cuts down on the squished poop on the fleece.
Hope you can get it to work.