Litter with fleece can be an issue, cause the chips will tend to get stuck to the fleece and it becomes a real hassle. I have a tiled cage and a litter pan, and I think I'm pretty lucky cause Chia won't pee anywhere where it's not absorbant, so no matter where the pan is, she'll pee only in there. So far that's the best cage I've had, I love it.
both of my boys were the same way before i got them fleece liners. they wouldn't pee anywhere that pee could pool and not be absorbed, so they'd only pee in litter pans. now the lil monkeys seem to think that any fleece surface is a pee spot, and their brand new wood shelves i just put in last weekend have been peed on already too. lil buggers! lol.