I've used corn cob litter and I've used wheat litter, but I always go back to Dr. Elsey's Precious Cat Ultra, sometimes mixed with Cat Attract. Wheat and corn are allergens for many cats, and I can't take any chances with Gizmo's asthma. Precious Cat litters are clay, clumping, dust free (really!), and unscented. I scoop once a day, and we have NO problems. I used to scoop twice a day, but since I switched to a quality wet food diet, he doesn't need that extra scooping ifyaknowwhutimean.
CAT--One **** of a nice animal, frequently mistaken for a meatloaf. — B. Kliban