Ive used different things as well. I used towels, pretty stinky. Ive used wood pellets, pretty heavy and hard to spot clean and super hard for a whole cage change. Carefresh is just too expensive with three 2x6 cages at the time. Im currently using uhaul pads. They are reasonable, about 7$ each and I fold in half to have a double layer. There ok. I find doubled over soaks through to the vinyl liner underneath, don't smell as bad as towels. But because it doesnt seem quite as absorbent I do put a single layer of towels under the uhauls. Only some spots are wet through to towels.
I agree, just switch around and see what works best for you. I have a 2x1.5 kitchen area that is fleece and uhaul as well. That works better as they do a lot of their business in there and it is small enough I can change out every couple or three days.
Good luck