Costco review: simply purrfect

I've been purchasing and using Litter Purrfect and now Simply Purrfect litter from Costco for probably over 10 years and until the last year or so I have been extremely pleased. However, I have noticed a continual decline in this product over the last year or so. It no longer controls the odor and the clumping is very hit a miss. Sometimes it clumps the urine and other times there is just a large, unclumped puddle of urine that then will not scoop our with the litter scoop, as it just falls thru the sifting slots. Additionally, and there is sooo much dust my cats have begun coughing when they are using it and everything in the cat room is covered with the powdery dusk. I have put off writing any sort of review for several months, but have finally gotten to the point that I feel Costco and any new consumers (as those using it obviously already are aware) should know about these issues. I am looking at changing the brand of litter I use by trying others on the market. I sincerely hope Costco informs Simply Purrfect to go back to an older formula so that I may continue to purchase the product knowing it will do the trick. Thank you for your time.