A clean litter box makes for a healthy and happy cat. We recommend replacing Modkat Reusable Liners when there are signs of fraying, or after 3 months time to keep bacteria and odor in check. The integrity of the liners depends on how many cats use the litter box, how much litter is used, and how ferociously they scratch. Daily scooping and sustaining the litter level at 2-3 inches (5-7.5 cm) will maximize their life.
My female cat pees up somehow. This XL litter box with liners is the first box to keep it contained. So easy to clean, just unhook liner and toss in trash every 3 months. Easy peasy. And first liner she hasn’t scratched through.