Golf clubs groove sharpeners definitely work. When a groove sharpener is inserted in the indents and carefully guided back and forth, the grooves' edges will reform and sharpen. Using a groove sharpener can give a golf club a little more grip on a golf ball.

Do pro golfers use groove sharpeners?

While there is certainly some technical expertise that helps, what most players don't realize is that the grooves the pros use are as sharp as legally allowed. Many pros replace their irons and wedges every week and their grooves are sharpened after every round in some cases.

How often should you sharpen your grooves?

A decent rule of thumb though would be to re-groove every 15 - 20 rounds of golf.