Put white vinegar in a container, large enough to hold your nails inside, let them sit with the vinegar for about 10 minutes, remove your hands and let them dry naturally, do not use rags or cotton to dry them.
Once dry, with a clean toothpick or a previously disinfected manicure object, remove the dead skin that has remained below and above, you will see how everything that generated the fungus comes out. Finally, you cut them as shaved as possible.
Repeat this action for a week.
Your nails will be completely healthy and without chemicals.