I'm going to do my 4th cleanse tonight (just drank the nasty Epsom Salt water). I wanted to say though that for me, it seems easy to tell the difference between some little oil blobs and stones, especially the 2nd time. I passed a relatively large stone (along with many small ones). I wanted to check to see if it was indeed a stone. It was hard and when I broke it in half, it looked layered with almost a tiny hollow center. It had also been fairly uncomfortable the night before, so I imagine that's what it was. I'm including the flush in a larger cleanse program this time. If I have good results, I'll report back.