I was always wondering, why doesn't coconut water (at least strore-bought one) taste even remotely like coconut. Anyway I often drink it after working now as its very hydrating and contains electrolytes, and as written here in the article about coconut water weight loss, it contains few calories.

There are some natural remedies that can help. For example Aloe vera gel or juice have antibacterial properties - read this article about aloe vera for fungus tratment. Eucalyptus oil is also an excellent antifungal. Another good one is tea tree oil. And of course vinegar, as was mentioned by previous posters.