Food sticks to the grill because of the moister in the grill. Often we hear that we should oil or spray or grill so the food does not stick...but the food still sticks. Why is that? Food sticks to the grill because of the moister in the food being cooked in a dry heat environment. I don't want dry food so what can I do? Instead of spraying the grill, spray the food. The little bit of oil in the spray will create a seal on the food and prevent it from sticking. This will also keep the food moister, sealing the moisture in.