Putting is a union of your arms and your hands. When your putting seems to be going a little haywire, try a drill I call “Left, Right, Both.”
Using three balls, hit one with only your left hand, one with only your right hand and then a third with both hands. What you’ll find is that one of your one-handed putts is going to be closer to the ball you hit with both hands on the club. The other putt is the hand you need to work on.
Whatever hand was the farther of the two, hit more putts with that one hand and shore up your putting woes.