THINGS THAT WORK:  For our sins we have four indoor cats.  We’ve tried a variety of litterboxes.  This works. We have two of them.  As long as you clean the waste drawer twice a week, it doesn’t smell at all.  They’re more expensive than competitors but they last three times as long and smell ten times less.  Of course, do not do what I did tonight and drop the full waste receptacle down the attic stairs.  On the good side, it kept me from watching the debate.  Also gave me a ton of empathy for Mitt.