Don’t discard your leftover popcorn! Air fryers, with their convection heat, offer an efficient way to restore the crunch of stale popcorn. Follow these steps to revitalize your popcorn in minutes. Alternatively, spread it on a baking sheet in the oven or reheat it in a pan on the stovetop, albeit less effectively. To enhance the flavor, add seasonings or drizzle melted butter. Repurposing options include popcorn balls, pudding, and even a topping for recipes.