Planning on doing a colon cleanse?

I am already a very good eater, no soda, no fast food, eat lots of things organic, fruits, vegetables, I don’t eat beef or pork, get a lot of fiber etc. But lately I’ve been feeling clogged and I want to cleanse my colon.

What are good products for this that I can find at the grocery store?

And for those of you who have done colon cleansing, what was the outcome?