Try "Smooth move" tea.

On the amount of salt, it calls for two teaspoons, and also says to experiment with the amount by trying a little less or a little more.
Alot of people do better with a little more.

Gray Celtic Sea Salt has been raved about on this forum as being the best for a long time.
Here is one post regarding it. - //www.curezone.org/forums/m.asp?f=478&i=15667

Beyond that, the only thing I can think of that may be helpful would be some colon cleansing between Master cleanses.
You could check at the Bowel Cleanse Forum .
Of course Oxypowder is good and also Dr. Schultz's products are good.

Hope this helps.