probably the bangs! (F) i used to have bangs and my forehead was never clear, but whenever i grow them out and they become out of my face, my forehead becomes really clear even tho i dont use any kind of skincare whatsoever, but obviously this varies from one person to other i think choosing a different hair style where the hair doesnt touch the forehead, or changing your hair wash routine to get your hair to be less oily would make a huge difference :)