This rattle has been hand sanded smooth and left unfinished without any waxes or oils. You can coat it with a natural oil to improve the wood grain. As this is a natural wooden product, variations and imperfections in the wood is normal and not a defect.
Stick these in the fridge before use and the coolness will soothe babies’ gums.
Clean with a damp cloth and never use aggressive detergents or disinfectants. Do not immerse in water for extended period.