You need to get the pressure off the hexes of the bar and the sockets, then they should slide out. Factory bars have a bit of a helix/twist in the hex which helps to keep them in. Think of it as a fastener stuck in your socket, after putting some grunt to it, that you have to change the rotation back the other way for it to pop loose. Loosening up the control arm shaft nut, say a little less than 1/4", then thumping it back gets it unstuck from the k and helps it to rotate freely to further aid getting the bars free.