I do not think this is directly the case, but I will post again if I learn otherwise. Products like the one I mentioned in the other topic address a number health and hygiene challenges MMA fighters apparently have to deal with - including sanitizing their equipment (gloves) and dealing with a range of other maladies that are expected in public locker rooms.
I am not familiar with the sport, so I am mostly speculating.
If it’s just a superficial infection of a small area you can treat it with home remedies.
If the infection goes deeper you’ll need to grind off the nail before applying anything. Loceryl can help but is usually too weak. If the fungus got really comfortable, you’ll need to grind off the infected part and tackle it with a mix of fungicide applied locally and some pills like the one mentioned above.
Grind down the nail with single-use files, keep your feet as dry as possible. Wash socks/shoes separately and as hot as possible.
FunghiClear is sprayed on the feet. No grinding away surfaces to expose the problem - the Manuka Oil will reach the problem and stop the fungus from growing.
I understand that all onychomycosis treatments stop fungal growth, and then it’s a matter of waiting for the nail to grow out, which is why it takes 3 months to complete the whole process. It is recommended to apply the treatment daily (or 3x a week), and simply spraying it is not asking a lot. Most of what you will find in the market today are “lacquers” that are painted on like nail polish - so applying them daily becomes a chore over 3 months.
This post in New Zealand was helpful to my understanding
FunghiClear has 3 other essential oils mixed in with the Manuka Oil: Basil, Mint, Lavander. These are mostly for making the whole experience pleasant - and to encourage you to regularly spray the insides of your shoes as well (Step 2 in the link below), since that is likely the environment where your toenail acquired the fungal infection
You can read more about this on the global brand site