Use a swifter and never touch it. Almost any cloth will have dust embedded in it and will cause micro scratches… dulling the finish. If you had accidentally touched it, then use a brand new / perfectly clean fluffy micro fiber closet with a small mist of water on the cloth.
Once clean, don’t touch and dust with a swifter.
It most beautiful finished items I owned are my Sonus Faber Amati in red violin… they are simple mesmerizing to look at. I want to do nothing to take away from the finish.