Fill a large dish or pan with enough water to cover the corn. Completely submerge the corn for 15 minutes in the water. If necessary, weigh the corn down so that it is fully submerged. While corn is soaking, preheat your grill on high heat. Once corn has finished soaking and the grill has preheated, reduce heat to medium and, using tongs, remove corn from water, allowing it to drain before placing it on the grill.