I don't think it's a big secret. Go a practice chipping it on the green? I did & I don't think its all that. You gotta ding/nail it perfect & hit way harder,depending where it lies. idk,,,it didn't work out that well for me.
I thought it was harder to get it close with the wedge than a putter anyhow.
just sayin
sometimes I''ll flop a shot from like the fringe & cozy it down to the hole, like that.