Usually it's the beginner golfers that struggle with being able to consistently brush the grass and hit the ball in the air, but thin and topped shots can happen to every player.
The issue is that the bottom of the golf swing is not low enough to hit the ground, and the club will instead hit the equator or very top of the golf ball. Many times a golfer will say "I lifted my head", but in reality they shortened their arms or kept their weight on the back foot.
Here's some proven drills to help you make clean contact with the ball and remove the embarrassing topped shot from your game.