Kosher Ham -“I used the prescription nail polish, Penlac (TM), with it’s 8% cyclopyrox (sp?) anti-fungal religiously for 6 months, too, but that barely made any difference on the most severely infected nails.”
You probably didn’t use it right. Here are the directions that must be followed to the tee. Note the part about filing and/or cutting/removing diseased nail.
“To use ciclopirox topical nail lacquer: