"I used to be a satisfied and loyal Tidy Cats customer, but over the past year or so I have noticed a distinct decline in clumping power, more so in the immediate odor control than in the long-lasting odor control version. We have a LitterMaid, and this is a huge disadvantage. We have contacted Purina a couple of times and received coupons for replacement litter, but this time we are going to try World's Best Cat Litter. I have to agree about the low tracking, but the dust it leaves in the LitterMaid...well that can't be good for the equipment."