Mine shredded liners too. They like to scrape at the litter to hide their business and that means claws impacting with liners rrrriippp!
I use stayfresh clumping litter from b&m.
It’s brilliant.
The poo is easy to lift out and the pee solidifies overnight and if it’s deep litter you just lift it out as a lump easily in a doggy poo bag. Sooo much easier than wood pellets or non clumping litter. It’s a game changer for me. So much less hassle. And only £3 odds a bag.