You have probably been very careful about what you eat as most of us with Chronic-Fatigue-Syndrome have to get pretty fussy to survive. This means that your kidneys and bowel are quite clean unless you suffer from bacteria overgrowth or have an unexplained tummy bulge. Consequently, although it is prudent to clean the kidneys and bowel the liver-cleanse may provide the best results.
Don't underestimate the value of parasite cleansing.
One common factor in people with Chronic-Fatigue-Syndrome is that they have difficulty is suppressing an virus called Epstein Barr (EBV). This gets into the liver and when you liver-flush you get heightened infection.
I call this re-cycling and it continues less and less with each flush. You almost go back in time until the point you became ill. This is what it felt like to me and others.
You should try to flush as often as you can but allowing time between them to recover. If that time is 6 month so be it. The time between should improve as your body gets the benefit.