For fungus, Press'n Seal is absolutely great to wrap a toe with for during the day or a bedtime. You will be sealing it from the air. But, whatever you apply it will still be there twelve hours later. Just a 4 inch by 6 inch piece.
I have one foot cured and the other almost done with this new approach. I dip my toes in scalding hot water (one at a time) long enough that I can't take the pain anymore. I dry them off with a hair dryer and then apply antifungal ointment. I trim the nails as short as possible. I have been doing this for two weeks at bedtime and in the morning. It's working for me so far. I make their home small, hot, and poisonous. If they still want to live there, they will be uncomfortable
Just a hint for all the medications you try. I found it best to appy after showers, soaking etc. But also needed to use on perfectly dry nails like at bedtime. You can see the liquid being pulled in by the dry tissue. Cures work much quicker.