. "The present invention further includes a method for using the hair clarifying composition to remove residue from the hair....http://www.google.com/patents/US6723308?utm_source=gb-gplus-sharePatent US6723308 - Pre-straightening the hair, first removing a residue from the previous straightening treatment, treating with an aqueous solution including an acids and an amphoteric surfactantAdvanced Paten" . . .