Cooked corn is a whole new mystery. Look for slimy spots. If the kernels look separated and wrinkled, it's been boiled and abandoned.
Smell cooked corn immediately. If it smells more like a barn than a garden, toss it. Never reheat corn that smells "off." That’s a recipe for a sad bathroom visit.
Cooked corn only lasts 3-5 days in the fridge. Mark your calendar. It’s like a milk carton for ears.