A common home remedy for toenail fungus is that if you soak your feet in Vinegar it will help treat the toenail fungus. Where this rumor started is unclear. People have reported good results that they swear by (although these people never seem to be able to actually show you their feet). What is most likely happening is the vinegar is dying the toenails making them appear less fungal. But Vinegar has no, none, zero anti fungal properties. Vinegar will not, nor has it ever been able to kill toenail fungus.