I am always surprised as to where the heck people hear or come up with things. The books primary recomendation is tea at night SWF in the morning. Second choice is if you cant do the SWF in the morning is tea at night and in the morning.
From just a common sense view alone the SWF is the most efficient way to get the toxins out of your system as it washes the whole GI tract top to bottom.
Make sure you are drinking enough lemonade and water to stay well hydrated. Dehydration is one of the primary causes for not having eliminations while fasting.