I have the Litter Maid automatic box and the instructions recommend using "premium" clumping litter. I am using an unrecommended litter because it's cheaper (Scoop Away). It works well for the most part, however, there are still little clumps being left behind by the rake that I have to scoop daily. I'm thinking of giving the Litter Maid premium litter a try to see if it does any better. It is quite a bit more expensive, but if it will last longer between total changes without all the "leftovers", I think it would be worth the extra $$. Has anyone else tried it?