Gross! Also… a big percentage of the granules get flushed down the bathroom. I haven’t researched Those people specifically… but I can’t think about that it's very good for the plumbing. The granules seem to be plastic. Maybe they biodegrade? Idk.. not my fav. We're looking in to other programs. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html