I would just use a clean Swiffer duster for regular dust-removal maintenance. The finish is likely a polyurethane, which means it's pretty tough. I would just use a microfiber cloth with a spritz of auto detail spray, like the ones offered by Griots or Mequires. The main thing is to wipe very gently in straight lines and don't use abrasive cloths like paper towels. If you don't have microfiber, a soft 100% cotton cloth will also be OK, but microfiber is the best.
