Wood contains tannins that have a natural antibacterial effect.
However, if cleaning is necessary, for example if it is heavily soiled, then Ostheimer recommends:
Use lukewarm water, possibly with a little diluted vinegar or a splash of ecological washing-up liquid (liquid dish detergent).
Gently rub the surfaces with a soft, clean cloth or sponge.
Lightly sand natural wood figures (not painted figures) in heavily soiled areas with 120 grit sandpaper.
After cleaning, rub the toy with a soft cotton cloth and let it air dry.
Nest Notes: Ostheimer items are known for being very smoothly sanded; however, should you ever encounter a rough spot or edge, you can use the 'brown paper bag trick', where you rub a brown paper bag just a little bit vigorously, and it acts as a very, very fine sandpaper that generally does not affect the colour.
