So we recently adopted a kitten and let me tell you I can't stand the smell of kitty litter so in and effort to fight the stench I came up with a solution to my problem.
I thought about it and I thought about and I came up with RICE. Yes you read correctly rice was my solution. Rice is very absorbent so I mixed some rice in with the kitty litter and VIOLA the stench was gone.
Try it out and let me know how it works for you