When I was a child I had a couple of warts on my hand. One of my mothers friends told her to slice a potato and rub the juice on the wart several times a day and just let the juice dry on the wart.
She took a potato, sliced a piece off, rubbed it on my warts then put the potato in a baggie in the fridge. She used the same potato until it was gone, she just kept cutting off a new slice.
It took my warts away within two weeks. That was many years ago before GMO foods so I don't know how different the chemical make up of potatoes are today compared to years ago.
Who knows, it still might work. I think it'd be worth a try and cheaper than most anything else I could think of.