About the combat fungal infections of toenails, you can use a very simple way. Soak them in yogurt!
Regular yogurt contains live bacteria acidophilus and it is a great remedy for bacteria feet, those that develop between the fingers and the nails.
These friendly microorganisms can kill the fungal infections. The infected parts you can treat locally or simply apply yogurt and leave them to dry.
Then just rinse with cold water. (Do not use yogurt with different flavors).