Soaking corn before grilling helps prevent the husks from burning and keeps the kernels juicy. To soak the corn, soak it in water for at least 30 minutes before cooking. This allows the straw to absorb moisture, which creates steam during roasting and allows the corn to cook evenly and increase its sweetness. After soaking, shake off any excess water and place the corn directly on the grill over medium heat. Bake for 15-20 minutes, turning occasionally, until the crust is charred and the hazelnuts are tender. This method ensures that the corn on the cob is fully cooked and delicious.