That's what I think when I take it apart two or three times a year to give it a tune up. Gross. Smelly. Poop residue. Then I laugh while I am scrubbing away thinking of the thousands of pounds of smelly kitty litter I spare myself each year and the daily trauma of cleaning out a litter box each (err, umm) day... Best investment ever. I said that out loud tonight and I mean it (my family thinks I'm a little crazy but they never dealt with clumping litter). Just a little TLC and we have been together for nearly five years now with no end in sight. Thanks folks, and I mean it. I love you, Man!