Gross! Also… a substantial portion of the granules get flushed down the rest room. I haven’t researched People specifically… but I can’t imagine that it is great for your personal plumbing. The granules seem to be plastic. Probably they biodegrade? Idk.. not my fav. We're searching in to other devices. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html