If you use a smart litter that works with clumping litter and accumulates clumps of soiled litter in a waste bin, OdourLock maxCare should work. All you need to do is look at the granules on the clumps in the litter tray before discarding its contents. Please note that some soiled granules may not be eliminated by your automatic litter system, so it may be a good idea to also analyze the clean litter box to make sure no blue granules are present.