White flakes on your shoulders are less than flattering. If store bought medications haven't worked, try using mouthwash to beat off the dandruff..
To create this anti-dandruff concoction, you'll need one part witch-hazel, one part mouthwash, and eight parts water. Place the mix in a spray bottle and spritz on your scalp and roots. Make sure your hair is still damp when doing so.
Check out this video for other alternative uses for mouthwash, including making flowers last longer.