Doesn't smell
This Catsan Active Fresh is absolutely top-notch, it clumps really firmly. Catsan Nature is also excellent, doesn’t smell and clumps well too, just a bit dusty. Among the cheaper options, Sanicat with Marseille soap is good as well, clumps nicely and doesn’t smell. Ages ago, Zverlit used to be good, but I just don’t get how they could mess up the formula so badly that it now smells awful really quickly, even if you clean it three times a day. Over the years, I’ve tried loads of different litters.