Apple Cider Vinegar definitely works. I had plantar warts on my foot for 6-10 years that spread all over the bottom of my foot and eventually had one on my finger. I was in out and out of the doctor trying different procedures that hurt and didn't do anything but irritate and peel the skin around the wart.
Then I came across a blog about ACV and thought I'd give it a try. The one on my finger was completely gone within a week and my foot has cleared up amazingly. I am still treating my foot as they are quite deep but it has cleared up so much you can't even notice.
I just soak the area in a dish of AVC for 30 minutes a day then soak a cotton ball in ACV and tape it on with a bandaid over night. If they are on the foot I would lightly scrape the area with a blade or use a pummice stone.