Nail fungus can be really stubborn. Here are some remedies that might help:

– Tea Tree Oil: Apply a few drops directly to the affected nail. It has antifungal properties.
– Vinegar Soak: Soak your feet in a mixture of water and vinegar (1 part vinegar, 2 parts water) for 15-20 minutes.
– Baking Soda: Mix baking soda with water to create a paste and apply it to the affected nail.
– Coconut Oil: Apply coconut oil to the affected area. It has antifungal properties.
Some other things that might help:
– Keeping your feet clean and dry
– Wearing breathable shoes
– Using antifungal sprays or creams
– Trimming your nails straight across and avoiding sharing nail care tools
If the problem persists, talking to a healthcare professional might be a good idea.