I have a batch of K-meta stored in a plastic spring water bottle. It's about a month old. I mixed it in spring water using 3 T K-meta and 2 tsp. tartaric acid as I always do. It was fine when I first mixed it and at least for a couple of weeks after that. I went to use it today and noticed it was milky looking and had extremely fine white sediment on the bottom. Has anyone else ever experienced this? Any idea why this happened? This has happened to me on a few other occasions.