In order for your cat litter odor control to last longer, you need to follow best practices. First off always use a litter that has a box the size correct for your cat which improves litter holess and means less cleaning. Scooping out clumps often would stop odor development and fresh litter would boost potency. A litter mat would also cut down on litter changes. Finally it should be put away in a dry and cool area.