I have completely cured my own and another person's fungal nails (big toes) using black walnut tincture. Fill a jar with green walnuts with the husks on, fill remaining space in jar with Everclear grain alcohol, seal and let sit, shaking maybe once a week or so. In one case the toe was dipped into a shot glass of the tincture for a few minutes each morning, in the other simply applied with a dropper once a day. Die-off was fastest with the immersion, but some inflammation occurred. This was easily resolved by immersion in Common Plantain tincture made by gathering the leaves and blending to pulp in a solution of grain alcohol (Everclear) Plantago Major or Common Plantain is extraordinarily effective for healing and infections and should always be on hand: make the tincture in summer for winter use when the plant is not available.
I am thinking that combining it with DMSO would make it far more effective. I have the beginnings of a toenail fungal infection. I will report back with my findings.