Iron x to "hang" ?

I have a fairly solid iron x now and can begin to pull back in occasionally. I, however, lose my grip when I try to come all the way down and "hang". This video can better show it :) (@ http://m.youtube.com/watch?v=EmDsixoOzlg&desktop_uri=%2Fwatch%3Fv%3DEmDsixoOzlg ) Thank you!