Truthfully! When the corns are being removed from the cobs, I guess to some the cobs become useless and it will be disposed. I don't know maybe you have seen of this nature before bring used to making fire because here in Africa, cobs are not always disposed instead they are always used to make up fire.
Normally, I keep wondering how these things flare up so fast when they are being lightened. I have experienced it at my Dad's farm when he was alive. He constantly used it in the farm when there is need for us to eat fast food in the farm, food like roasted yam, cocoa yam or roasted corn. I saw this means going into extinction because of the era that we are. People are gradually forgetting the doing of those days that helped to save high cost of living.
But right now, like I have said it's the high of cost gas and kerosene is now making people to go back to the old days of making fire with firewood with the likes of corncobs as back up.
You can click below to view some of my projects.
PART ONE OF THE BROODER PEN CONSTRUCTION:- CLICK HERE👉🏻SOURCE
PART TWO OF THE BROODER PEN CONSTRUCTION:- CLICK HERE👉🏻SOURCE
PART THREE OF THE PROJECT,THE BIRDS ARE NOW 2WEEKS PLUS:- CLICK HERE👉🏻SOURCE
Also thanks to 
@peterale