Add bowel cleansing to it, if you have not done so. The toxins are coming out through your skin. If you don't do a colonic after the flush, try to do several enema's to help things along.
Also start of with a clean bowel when you do the flush. I personnally do the 3 evenings of OxypowderOxypowder .com">http://www. Oxypowder .com , they also have a flush under their product superfos30.
If you don't want to spend money take 1/2 to 1 tsp of Epsom Salt the three evenings before to preclean your bowels.
Also if your Acne is hormone related it might take a couple of times to balance the hormones.