If you want to continue using a clumping litter, I highly recommend Dr. Elsey's Precious Cat Ultra or Classic. You can buy these at Petsmart and they're unscented and there's very little dust. I started using the Cat Attract Litter by Dr. Elsey when I was having urinary problems and it's also great but more expensive. Now I mainly use the Precious Cat Ultra and I love that it keeps the odor under control without using any scent and my cats love it too. Good luck.