The food-safe finishes I use for bowls are water-resistant – not water-proof. Wash wooden bowls, spoons, rolling pins, and cutting boards with mild soap and warm water. Rinse and towel dry immediately.
Wooden kitchenware is not dishwasher safe and should never be left in water to soak. Excess water for prolonged periods can cause the wood to swell and crack. Also, do not put wooden bowls in the microwave. They will super-heat, split, or even catch fire!
If the wood starts to look faded or dry, rejuvenate it with a quality butcher block / cutting board oil or conditioner, such as Howard Butcher Block Conditioner or Mahoney’s Walnut Oil. You can find these and other good choices on Amazon or at you local Lowe’s, Home Depot, Woodcraft, etc.
NOTE: If your woodenware sees only light use, an occasional buffing with a clean cotton cloth will be all that’s needed to keep it looking great.