Before roasting corn, it is best to sprinkle some water on the surface of the corn and seal the mouth of the plastic bag. This way the roasted corn will not become hard due to water loss.
If you want different flavors of grilled corn, you can brush on some applesauce, condensed milk, hot sauce, barbecue sauce, and other condiments before putting the corn in the microwave.
The advantage of wrapping the corn in tin foil when grilling is that it retains its original moisture. Just brush the corn with oil and wrap it in tin foil and grill on grill mode for 8 minutes, rotating once every 4 minutes.