Tea tree oil is a natural disinfectant with both fungicidal and antibacterial properties which makes it a popular remedial measure in the treatment of nail fungal infections. They can also be added to other mixtures as well. But before using them, make sure the oil is completely diluted. Once you come across the symptoms of nail fungus, make a solution of tea tree oil. 1. Pour in a few drops of oil directly onto the site or soak a cotton ball in the solution and apply to affected nails pressing them gently but firmly so that the liquid comes out. 2. Gently scrub the affected nails with the help of a toothbrush, so as to make sure the oil reaches deep into the nails. 3. Let it dry out naturally, meanwhile, you can also soak your feet in a solution containing 4-5 drops of tea tree oil and water. 4. Continue this process for about 15-20 minutes. Both these treatments are best when done in morning or evening.