Try Mirazyme, the McNett product mentioned above. It's an enzymatic product that will be gentle to your liners, i.e., won't ruin them. <br><br>Prevention is best, naturally. Promptly and thoroughly dry the liners after use. Or try working with the source of the problem - da feet. If your skin will tolerate it, try a gentle deodorant/anti-perspirant. Or use sock liners woven with those anti-bacterial silver threads, like Fox River X-Static liners.