I used to do enemas whenever I fasted. Hated it. I knew the whole time that I was only cleaning a very small amount of my intestines.
Once I learned about the flushes and tried it once, I have never done another enema.
Make sure you use the exact ratio of Sea Salt to water or it will not work.
Make sure you do not already have other liquids in your stomach or to follow the salt water flush with other liquids.
The only reason that the flush works is because you are creating a salt water solution that has the exact same specific gravity as your blood. If the specific gravity of the salt water ends up being different when it is in your stomach then your body will absorb it instead of passing it true your intestines.