This Kefir Starter Powder is an absolute disaster. Despite meticulously cleaning and sanitizing the vessel and strictly adhering to the recommended temperature and procedure guidelines, it failed to ferment at all. Adding insult to injury, after just a few days of fermenting, the mixture started to develop mold. It's not just disappointing; it's downright disgusting. To make matters worse, returning this worthless product isn't even an option. This isn't your traditional kefir grains; it's more like a starter power for frustration and moldy concoctions. Save yourself the hassle and find a reliable kefir solution elsewhere. This product is a complete and utter failure.