Re: making liners
Can't help. Per usual.
But...all I use is a piece of fleece double the size of the cage, then folded in half. So there's two layers. Snarf gets most pee/poop in the litterpan and wheel, so maybe I have just been lucky, but I have never seen the need for a middle layer. I poop-pick and lint roll daily; change the liner twice a week. I ask every single person who comes anywhere near our home (friends, mother-in-law, delivery people, meter readers) if they can smell anything and, even with a three-day-old liner, they always say nope.
I get why some people do and kudos to your for doing it...I just want to try and save you some work.