I accidentally bought a huge bag of clay cat litter. I didn't realize it until I cut it open and thought, man, those pieces look awfully big. DUH! Anyway, I hate to just throw it out, but i"ve never used clay litter. How do you clean out the box? Do you have to dump the whole thing every couple days or will it last longer. It's obvious how you remove the solids, but what about the urine? I absolutely HATE the smell of cat pee. Yuck! And I don't want my house smelling of it. Any suggestions??? THX!!!