For our wooden EXO23 & EXO24 cases the best way to clean is to dampen a lint free cloth either with a solution of equal parts water and vinegar or just plain soap and water. To care for the wood you can gently rub the wood panels with a natural furniture polish wax on a lint free cloth. We recommend — Clapham’s Beeswax polish, Daddy Van’s Unscented Beeswax Furniture Polish, Three Beautiful Bees Beeswax Polish, or Briwax (this works very well but does have a very specific scent). You can find these products on a website such as amazon.com or at a local hardware store.
This video of cleaning a wooden table may be helpful and is a very similar process to caring for our wooden cases: