
In a large pot or tub, soak the ears of corn in water at least 30 minutes. Place something heavy on top of them so that they don't float.
Pull the husks back from the corn, remove the corn silk and pull the husks back in place. See notes.
Place the corn directly on a heated grill rack and close the lid.
Turn the corn every 3 minutes and cook about 30 minutes total.
Transfer corn to a platter and without detaching the husks, peel them back completely, turning them inside out so they form a handle.
Brush the corn with some butter and return the corn to the grill for about 5 minutes, turning it frequently.
Return to the platter and brush with the Cilantro Lime Ranch & sprinkle with Tajin or Chili Powder.
Combine all ingredients in a bowl and mix well. Store in refrigerator until ready to use.