I am due for my annual colonic via water hose. It really was amazing how well it worked. I lost a few inches around my waist cuz I was so bloated. You'll feel squeaky clean from the inside out.
I have also done an herbal/fiber cleanse. Get on Colonix (http://drnatura.com/)
, it is the best out of any of the ones I saw reviewed and I also took it.
It comes with a parasite cleanse too. I swear I used to have a tickling on my cornhole from the wrong side, which could be an indication of worms. After using that "shit" I no longer feel them. I swear that after the first week on this "shit" I saw the worms come out in my poo. It was pretty "bad ass".
You'll get constipated for a few days, followed by the most mind-numbing shit you've ever taken in your entire life. You'll need to flush at least 5 times and refer back to the other thread on how to wipe your ass.