19. Remove Fingernail Stains. 
Mix equal parts baking soda and peroxide in a small bowl, and gently scrub your nails with the mixture using an old toothbrush. Rinse thoroughly. Over time, this should remove staining.
45 Things To Do With Baking Soda
19. Remove Fingernail Stains. Mix equal parts baking soda and peroxide in a small bowl, and gently scrub your nails with the mixture using an old toothbrush. Rinse thoroughly. Over time, this should remove staining.