Hydrogen peroxide has some whitening properties that can remove nicotine stains from your fingernails. Pour 3-4 tablespoons (15 ml per tablespoon) of 3% hydrogen peroxide into half a cup (118.5 ml) of water and stir well.  Then, dip your nails into the solution and soak them for about 15 minutes. Use a toothbrush to scrub any remaining stains off of your nails and then rinse off your nails with water.  You can use hydrogen peroxide to clean your nails once per week for up to three months. Keep in mind that this method will sting if you have any small cuts on your fingers. Vinegar derived from apple cider contains acetic and malic acids that can decrease discoloration in nails. Pour half a cup (118.5 ml) of lukewarm water into a dish with half a cup of apple cider vinegar. Soak your affected nails in the solution for about twenty minutes. Then, rinse off your nails and use a towel to dry them off.  You can repeat this process three times a day for up to a month. Soaking your nails in apple cider vinegar will sting if you have an open wound. An alcohol-based mouthwash can also help to get rid of stains on your fingernails. Pour some mouthwash into a clean plastic cup. Make sure that there is enough for you to dip your fingers into the mouthwash. Soak your nails in the mouthwash for 30 minutes.  You can repeat this process once a day for one week. This method works best with Listerine or a similar alcohol-based mouthwash. Orange peels are also high in vitamin C and they can help to get rid of yellow stains on your nails as well. Peel an orange and rub the inner portion of the peels along your yellow nails for 5 to 10 minutes per session.  Do this two to three times daily for several weeks. You can also add two tablespoons (30 ml) of dried orange peel powder to water to create a paste. Use a nail brush to layer the paste on your affected nails. Let the paste sit for 10 minutes, and then rinse off with tepid water. Do the paste method twice a day for a couple of weeks.
اغمر أظافرك في ماء الأكسجين. ضع خل التفاح. اغمر أظافرك في غسول الفم. افرك أظافرك بقشر البرتقال.