Cleaning your small and large intestine can be done through a few different methods. One of the most popular is a colonic irrigation, which involves flushing the colon with water to remove fecal matter and other toxins. Another option is a special diet that includes foods that support digestion and prevent constipation. You can also try supplements such as fiber, magnesium oxide, or digestive enzymes. These can help to keep your digestive system regular and healthy.