Water fasting. Sea Salt Flush versus Enema?

Over my life i have consistantly used short fasting to stop the onset of colds and flus. I now rarely get sick and when i do start to feel the onset i fast for one or two days and my sickness cures itself. I know the benefits of fasting. However, i now plan to do a longer strick 10-14 day water fast and was wondering if anyone has an opinion on using a sea salt oral flush versus an enema. During my short fasts i have no need to cleanse the colon. But for this longer fast i may need to help break up debris in the colon and again was wondering which method would work best and be the most beneficial?

Do you regularly cleanse your colon to keep the hole free from debris?