To clean the handcrafted birchwood box, simply wipe it with a damp cloth and regularly shake out any crumbs. To ensure the longevity of the natural material, the box should not be exposed to excessive moisture or heat. Therefore, it should be left open for two to three hours after damp cleaning. In case of heavy soiling or mold, the surface can be rubbed with vinegar or briefly sterilized in the oven at approximately 50°C to 90°C. Avoid oiling the box to prevent rancidity.