Try as you might my friend but it doesn't wash off, like skunk or garlic. You're now like a baby bird touched by humans, the natives can smell it on you. You might as well start drinking some Pabst and get a muscle car.
Just a thought. IBS and Diverticulosis can present identically. Your remarks about rice being problem can occur with both these conditions. If you haven't had one, get a Colonoscopy. If you've had one, then your diagnosis is good.