Yes, you summed it up well. Fungal infections are slow to grow, but once they get going, hard to kill. And Doctors so don't ever recognize them. If you kill the lip fungus you'll probably be able to avoid reinfection, but just more silver gel, so no biggie.
If you want to whack on the candida, also a fungus, you can use silver for that, too, but olive leaf extract is much quicker.
I'd always recommend Dr. Clark's full parasite cleanse with zapper, because my experience is that fungus only get's going like that if your immune system is being severely impaired, and I could bet you money it's parasites Toxins too, but get rid the parasites immediately, and get rid of the toxins as you can for the best start. :)