Hello, if there are hundreds of scratches or slight scratches on the mirror surface of the watch, you can first drop a drop or two of water on the mirror surface, then squeeze a little delicate toothpaste and apply it to the scratches on the watch, and then gently wipe it back and forth with a soft mirror cleaning cloth or cotton ball to remove the scratches and make the mirror surface as new. If the effect is still not obvious after wiping, then this situation is not a slight scratch. I suggest you go to the relevant after-sales service center or click on my home page for consultation, so that professional technicians can repair your watch accordingly. We also provide light polishing service for free. You can learn some daily maintenance of watches here, which can protect watches from unnecessary troubles.