I use excelsior padding. It is a little more expensive, but they can’t scratch it out & it’s compostable. I buy the bulk stuff, not the pads, make a well in the middle & the stuff lasts a very long time. I have had a box of it for 5 years & it’s still basically full. I find if someone is molting & sleeps in there the poop just shakes out & I can flip it over. If an egg breaks I can just pull the icky part out.
I don’t think it’s a hugely popular option, maybe because of the price compared to straw or shavings, but I really like it. Much cheaper if you buy a box of the bulk stuff.