I take swiss kriss, but not in exchange for the SWF, rather in exchange for the smooth move tea. Swiss Kriss is an organic all natural laxative...as is the tea. The salt water only acts to "flush" everything out once the laxative has "broken" it up.
Swiss Kriss is NOT in the book....but I choose to use it because the tea doesnt work for me.
Hope this helps and good luck with the cleanse!