During my first colonoscopy, I was not cleaned out completely from the colon prep. I used Suprep. I followed the directions, but it did not work. The endoscopy was fine. The results were also fine. How many people have this problem? What’s to guarantee that it will work this time? Is this common? I do not eat right and am always constipated. I seem to be better now and have been eating a lot of fiber. How many people have repeat colonoscopies for the same reason?