For me, the best clumping litter is also the most dustiest of all of them. Scoop Away. It is great, but when you first pour it, it's a dust cloud. It's awful. But it does settle, after a few minutes. I have found it to be the best clumping stuff. I buy the 35 pounds, that has 2 boxes in one bigger box, and put the entire thing in a large rubbermaid container. This stuff goes the distance. It lasts longer than any other litter. I do also like Arm and Hammer, and then Tidy Cat, however, I don't like the Tidy Cat that has the glade air freshener in it, it is too overpowering, and my cats usually steer clear of the litter box I put that into, so I don't buy that particular one. But Tidy Cat clumps pretty good too. I have four litter boxes, so I am always experimenting with different types of litter, and for me, the Scoop Away is hands down the best at clumping. I even tried a bag of Dr. Elyese, and it was really good, but I still thought Scoop Away was better at clumping. The key is to scoop it every day (a must for my 4 cat 4 litter box household) and to keep it topped off so that it is about 4 inches deep. About once a week (or when it needs it), I wipe down the sides of the litter box. I scoop the litter to one side, wipe it down, and go around and do all the sides, and then I top them off with a little more litter. If I keep them topped and wiped and scooped, I only have to take them out and hose them out about once a month or so. I stagger when I have to do a complete change out, so I only have to do a couple at a time, because MAN is it exhausting having to house and and change 4 at a time, not to mention expensive! One of my cats has a room that only she goes in, so only she has access to that litter box, so it's smaller than the rest, which are giant rubbermaid containers, and that one is much easier to maintain.
I spend a FORTUNE on cat litter and canned cat food!!!!