As a smoker holds a cigarette, the nicotine from that cigarette transfers onto the fingertips and fingernails, leaving nails with a yellow, dingy appearance. The obvious solution would be to simply stop smoking, which would eliminate the problem altogether. Nicotine addictions, however, are a very hard habit to break, leaving smokers in need of an alternative solution to remove the nicotine stains from their fingernails.
Pour enough lime juice into a bowl to submerge all of your fingertips.
Soak your fingers in the juice for 10 minutes.
Pour 1 tsp of sugar onto your fingertips, and scrub into the fingertips. Repeat the soak and scrub procedure until all stains are removed.
Rinse hands thoroughly with warm water.
Use a cigarette filter attachment to prevent nicotine from transferring onto your fingers while smoking.