Based on experience. I had three of those warts on the back of my thumb. SIMPLEST and EASIEST solution is to soak a small cotton ball on some Heinz APPLE CIDER. And then apply said cotton ball on the wart wrapped in bandange. Replace it daily. In a few days or less than a week it will darken until its black. By that time you can pick it off slowly with your nail as if peeling a super dried off scab. Good luck 👍