Gross! Also… a big percentage of the granules get flushed down the bathroom. I haven’t investigated These precisely… but I am able to’t picture that it is great to your plumbing. The granules appear to be plastic. Possibly they biodegrade? Idk.. not my fav. We're hunting in to other devices. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html