The best way to grill corn on the cob is to grill corn in the husk, directly on a hot grill.
The husks protect the corn on the cob from getting dried out and the corn essentially steams in its own moisture while getting infused with smoky flavor from the charring corn husks.
It’s also so easy! No need to even break off the silks. Just place the corn, as is, in husks, on a hot grill.
ADDITIONAL CORN ON THE COB TECHNIQUES
Many people call for soaking corn on the cob in water first, before grilling. There’s no need if you are working with fresh corn to begin with.
Some grilled corn on the cob techniques also have you pull back the husks, take out the silks, and then put the husks back over the corn before grilling. I’ve tried that. It does make it easier after the corn is done when removing the husks. But I find the corn more easily dries out this way, and the best way for juicy grilled corn on the cob is to not mess with the husks.
If you want some grill marks on your corn on the cob, (as shown in the photos), you can pull off a few of the outer husk leaves, leaving less of a barrier between the outer leaves and the corn cob, for more the charring to reach the corn.