I've tried plaster adhesive bandages. I would put on on overnight, and take a layer of my wart off in the morning. I also saw a dermatologist who told me about a specialty pharmacist who makes Magic Wart Cream. I put some on Verruca, and it's supposed to make the wart blister. So far, it's not gone.
By the way, if you want to see something gross...do a YouTube search for plantar wart surgery. Enjoy!