I read David's triphala recipe for eye wash (see How to do the triphala eye wash). One thing I would like to add... I am not sure if it was mentioned in the recipe, always use distilled water.
And by the way if you suffer from Intestinal Bowel Syndrome with bouts of diarrhea and constipation and irregularities... I have news for you.... 2 weeks ago I started taking one spoon of triphala powder mixed in water on an empty stomach after waking up... as an experiement.