How to get rid of stains on your fingernails planetzuri / January 13, 2013 Get rid of stains on your nail left by old nail polish or stubborn food colors! Soak your nails in juice of half a lemon for a few minutes. Then, scrub your nails with an old toothbrush. Wash off with warm water and find clear, shining nails! TweetLike this:Like Loading...