Dr G, is the fungus present in the bloodstream, and if so, is that the transport method that the fungus uses to infect other nails, both toes & fingers?
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.
I feel that people who use the mikvah have an obligation to others to be disease-free so as not to transmit any possible transmissible diseases & infections to others who use the mikvah. Apparently, not everybody feels the same way I do about this topic.
Some people out here would rather you spend your hard-earned money on modern day snake oil remedies, sadly.