I repeat, take a big ole dose of powdered fiber every day. Then it doesn't matter if you are hydrated or what your diet is on any given day or any of that. You will have a clean purge every morning right on schedule and you will never again have to deal with the issue. Once I discovered that, and I don't know why it took so long, my life literally changed.
This isn't directed at the previous posts, just a comment in general.