No technique really works. It is you who makes it work. That is called shraddha. Shraddha can be roughly translated as faith. When your intention and attention are there, manifestation happens. If your intention is not there it will not work. Sudarshan Kriya works because there is an intention behind it. For anything to work, you must have intention and attention. Then manifestation happens.
Buddhist Sculptures from Shandong - Southeast Asian Ceramic Society Bodhisattva in Pensive Pose with One Leg Pendent, Northern Qi dynasty, limestone with gold and coloured Pigments, overall height 90 cm, excavated 1996, Longxingsi temple site, Qingzhou City