Read this thread: http://strengthmill.net/forum/showthread.php?t=1138
and this one: http://strengthmill.net/forum/showthread.php?t=1132
and tell me 1.) why you didn't read them first, since one of them has basically the same title as yours and the other one also has "clean" in the title, and 2.) what might be wrong with your video. I can tell you that you need to quit looking straight down as you pull, and that it's not too bad otherwise, but for god's sake you guys, do your homework before you post these repetitive questions.