The book doesn't say anything about clarifying before starting so I didn't. And since I experienced noticeable improvement from the start can't say it's necessary, but if the person feels they have some kind of build-up it won't hurt anything to use one of the recipes in the book. But to me using a shampoo to "clarify" is an oximoron. It's like the person who says "I'll start a diet on Monday so let me eat all I can till then". Hello! You're only adding extra weight that will make your dieting longer! So using a clarifying shampooing "first" only strips the hair further, thus retarding the good effects of CG. But if anyone sees any sense in that, carry on...
Edited to add that the VO5 K&L is similar to the "Lemon-Aid" so IMO that would be fine.
2A/3A, medium length, layered, colored dark/medium ash blonde - "CGer" since April '02.
"Converting the 'curlskeptics' one curly head at a time..." HWHC