MC i'm not sure what makes it clump, but it does not clump the way that it shows in the video. They have some secret and will not say. Yes I know that freaks me out a bit, but they say that there is no chemical, so lets hope they are telling the truth. Im sure someone could get it tested and see what they use?? but that costs money. My cats do not eat it, there is a faint smell, but I cant put my finger on it to what that smell is.
When I scoop I scoop out poop first, then I tilt the box so all the litter falls to one side, then scoop out the pee clumps, easy peasy, and it doesn't stick like cement on the bottom. (This is so any small pieces do not mix in with the cleaner litter), and scoop gently. You do need to keep about 3 inches of litter in the box I find.
I will pay 40$ for large bag, however I did get it on sale for 10$ off last week. It last longer than regular clumping clay.
P.S I am wondering if they use some kind of gelatin to make it clump? tell me what you think when you get it.