Kishi has gotten into a bad habit of "missing" she'll pee in one corner, and it'll dribble onto the floor beneath the cage, sometimes if she goes in the middle of the night or if i somehow miss it, it'll be sticky when it dries.
but if your fleece is sticking to the pan, it should probably be changed more often,like say, every other day, kishi's cage gets cleaned out every weekend, but i use aspen in her litter tray, it's cheap and i can use it for all the animals, and possibly more absorbant,but that's all i've ever used so i don't know.