You didn’t ask me but
I would rough the wart up first before putting on the medicine. I think the liquid would work best but I guess the apple sauce would work too or crush a pill and sprinkle the powder on the wart and cover with band aid.
It’s a weird wart, it’s under the skin but hurts. Hub suggestion “minor surgery”, I’ll do whatever it takes. Been applying slices of garlic with slow improvement. I used garlic before on kids’ warts.