I don’t know how any makeup wearer lives without setting spray, but for oily skins I do recognise it has pitfalls as well as many benefits. Setting spray keeps makeup in place when warm weather might otherwise melt it away, and allows for creamier, more flattering products to be used in place of powders. But it also cuts through the dusty look of any powdery makeup to give it a softer, more youthful finish.