I have so far read the need to "lie flat on your back", "lie on your right side with your knees tucked up to your chest", "lie flat on your stomach". My first 2 times were on my back. My next 3 times was a mix of the first 2. My last one was exclusively on my side. My last one (#6) had virtually no results (unlike the others) - just a few small stones after 24 hours. Either I've been cleaned out or just had a bad run. Trying again in a couple of weeks, on my back again. Please comment.