i think your not patient enouf and when you are going for a grab you forget the spin technique .
so when you are going for a grab , wait a little, even if you grab for a fraction of a second . take your time , you got almost 3 sec in the air , don't need to grab has soon has you take off .
so has you pop and spin , count a second in your head then go for the grab . the feeling will come to you and you are gonna start grabbing sooner and sooner .
hit me back if it does'nt work