I had one on the ball of my foot for years, had it 'removed' by chiropodists and treated it myself but every time it re-appeared. Then I read somewhere about them being removed by the use of duct tape and sceptically gave it a try.
I used the kind which is silver in colour with a sticky white backing, cut a circular piece about 1 inch diameter, kept it on day and night until usually after about 3 days it came off and I then replaced it with a new piece. I did this for about 3 months and now, 6 months later I am cured, with no sign of it re-appearing.