Do the cleanse every 2-3 weeks. At the same time you can do a bowelcleanse, just skip it on the day of the flush. It is good to do a kidneycleanse every 4 flushes or so.
Also read Lisag message below.
Educational reading Julia Chang's website http://www.sensiblehealth.com and more info above FAQ and the same on bowelcleanse forum.