You can also sprinkle just plain baking soda over the litter also instead of the Litter deoderizor. It works great too.
I tried just about everykind of litter I could find. I settled on Tidy Cat and used that for almost a year, then I just bought a bad of Fresh Step, b/c I think that is what Noah's Mommy uses, she said she has no odor with 6 cats.
I also bought a bag of Feline Pine and followed the directions and put it in the box today, we shall see what happens.
Kylie is very very tolerant of her mommy switching litters, I don't know if she will like the Feline Pine her sister's mommy bought it and Tome HATED it. She just sat and stared at the box for about a half hour before she used it, She had to introduce it slowly and take it away slowly!!!