Let it affect for a while and wipe off for example with microfiber cloth. Remember to wash it first with runnin water to remove scratching materials.
Dry before using microfiber cloth to polish.
Use a small amount of liquid paraffin if needed and wipe off with microfiber cloth.
The end result looks like a new one.
Remember that our products are not ment to be toys, and due to the nature of the products treat them carefully, like any other jewelry or item. They are not unbreakable, do not throw it, bend it, or treat it badly any other way.
Keep products out of the reach of children!