Considering distilled vinegar as toenail fungus remedies  is very interesting option and quite cheap also effective against toenail fungus infection. The cost may less than half a dollar for the small bottle of distilled vinegar sufficient to treat toenail fungus. Although being a tight budget toenail infection remedy it works great as efficiently as other costly drugs.
 
Considering the composition it is 5% acetic acid known for prevention of fungal growth taking place by local application.
 
The process of application involves its spreading on the fungal infected toenail ensuring its application on the cuticle and beneath the toenail. For better results try to do re-spreading of distilled vinegar every minute for few minutes, which ensures that it gets soaked reaching the living tissues of the toenail.
 
There are few experts treating toenail infection with distilled vinegar and advise that the vinegar should be applied to the fungal infected toenail daily till infected grows outwards ready for clipping. Missing its application on a day allows the fungal infection hide under the newly growing uninfected toenail requiring restarting of the treatment once again from the beginning.