In general, corn can be eaten after overnight. As long as the cooked corn is placed in the refrigerator or in a ventilated place, if the corn smells no odor the next day and has a shiny surface with no mucus, it can be eaten.

Corn will generally keep for three to four days refrigerated, and more than six months frozen. Although the preservation time can be very long, but cooked corn is best consumed within half a month, too long a preservation period will lead to the loss of the original fresh taste of corn.