As I said before, fungus is like a mushroom, and needs a dark and wet environment to grow. It only makes sense then that if you put a fungus in dry and light surroundings, it will not be able to multiply. This is true for toenails too! If you were to apply the most effective antifungal ever to your toenails but keep them wet and covered, it will never work.
TRUTH: Toenail fungus is easy to treat if you deny it the environment it needs to grow.