I LOVE FLEECE!
I have 2 females as well, and just had my first cage change today, I have had the piggies for a week. I sweep it every morning when I do their veggies and it stays clean enough all day that I just need to do it again the next morning. They seem to do most of their business in the litter box where all their food is
I have 2 towels and fleece on top, the cleaning went really easily today, picked it up put it in the basket to go to the washers.. I had a few stray poos to sweep up, sprayed with vinegar and water and they are good to go.
Right now my girls are all sprawled out on the fleece not even in hidey houses which is a bit abnormal for them
It makes me happy to see them enjoying their cage