"Stomach Cleanse..."

The only time poo will stick around your insides, is if you have diverticulitis, toxic mega colon or a bowel blockage, in which case you would either have a raging infection or be severely distended in massive amounts of pain. Buildup just isn’t a thing that happens in the walls of a non diseased colon. It’s basically like a lubed up slip n slide in there! Something related to diet or functional bowel disorder might be either constipating you or slowing digestion, but don’t fall for the whole “cleanse” products and such. That being said, there is nothing wrong with cleaning up your diet! It can take a few weeks for your digestive system to adjust to changes in fiber though, so relief might not come right away