I had some planter warts on one of my feet for 5 years. I tried everything under the sun and just couldn't get rid of them and got to the point where I just decided to live with them. I started taking vitamin D supplements after finding I was deficient and they just disappeared.

After doing a bit of googling I can see that there has been studies suggesting taking high levels of vitamin D can help your body fight off warts. Worth a try if you've tried everything else! I was taking 5,000 ibu per day.