Preheat grill to medium-high heat. Fill a large pot with water and place the corn in their husks into the pot, ensuring the corn is covered. Allow the corn to sit in the pot for 15 minutes so the husks absorb the water. This will prevent them from burning.
Remove corn from pot and place on grill. Grill for 7–10 minutes per side or until tender on the inside. If when removing the husks, the corn does not have enough color, place the corn back onto the grill and allow it to char a bit longer to get some more color.
While corn grills, combine mayonnaise, garlic and the seasoning mix in a bowl. Place the cotija cheese in a shallow dish.
Apply the seasoned mayonnaise to all sides of corn, then dip in the cheese to coat. Sprinkle with cilantro and squeeze with lime juice. Serve immediately.
For safe meat preparation, reference the USDA website.