For me I tried left hand low, the claw,saw,pencil, reverse interlock, regular interlock, forward press no forward press, shaft lean no shaft lean etc.
I finally decided to to use my same ten finger grip I use on my golfswing.
I also started to putt under the string to make sure I was putting straight and also used the writting on ball to line up my putts, after Putting under the string for quite some time and still do.
That exercise REALLY opened my eyes to how bad I was putting/face control, army putting, left right, left, right. Not untill I got to square the face at contact did my putting really come around. Now I just line up the writting on the ball on the line I intend for the ball to start on and watch the writting tumple end over end to from a single line
and watch more putts roll in.