Clean golf clubs can potentially help to lower your score by ensuring that the club is performing at its best. As I mentioned before, dirt and debris can build up in the grooves of the club, which can affect the club's ability to generate spin and control on the ball. By cleaning the grooves, you can help to ensure that the club is gripping the ball properly, which can lead to more spin and more control. This can help you to hit the ball more consistently and with more precision, which can ultimately lead to lower scores.
It's important to mention that, while keeping your clubs clean can help to improve your performance, it alone will not lower your score. It's a combination of different things like practice, mental preparation, club fitting, etc. that will help you lower your score.