I have been way too far down this road. For putting, I’ve found the claw grip really shuts down my yip.
A few other things I have tried with varying success.
- cut out caffeine. Caffeine definitely makes mine worse.
- cut out alcohol. Similar to caffeine. Not good.
- look at the hole while putting.
- close your eyes.
Mine are most bad with chipping. I think mine started from sliding my hips. That closes down the face and puts too much force into the shot. So you can’t release the club. Basically I think the yip starts physical. An error in something and eventually becomes mental. A lesson might well be useful given that.