Ever watched a two year old squat down or lift anything? Seriously. They lift so purely, straight backed, whole body behind every move. They never bend over, they just squat down and go after it and haul it away.
I learned a lot simply watching my kids. There's a guy at my gym, who echos BtB. He always says never overthink a lift. Just grab it and do it naturally.
Of course he never does any power cleans, so there you go.