The best way to clean wooden spoons is to first wipe the spoons over with warm, soapy water. Then, stir a teaspoon of baking soda in just enough water to cover the spoon. Boil this for about 15 seconds before rubbing it down with soap and rinsing it off. Alternately, you could also submerge the spoons in 3% hydrogen peroxide. Lay them on a flat surface and pour over the hydrogen peroxide, wait fifteen minutes, rinse the spoons off and leave them to dry.