Hi Marsha,
Maybe you could try this experiment:
Entice the worm beneath
Our latest research on myiasis is here:
Close associations: Micro-Myiasis & Morgellons Disease
Its long, but should help to explain afew things. As Kammy mentioned, parasitic wasps infect fungus gnat larvae. Not only this but gall midge and phorids are attracted to fungus gnat larvae. So keep your eyes peeled for a small black midge around and get a bright torch and check your walls, ceilings, lamps for thin web strands.
I dont think that the Benzyl alcohol lotion, 5% will be effective - as we need to kill larvae under the skin, primarily, rather than adult bugs above it. If something is not ovicidal, then it means it will not kill eggs. Vinegar is our best bet for killing fly eggs - massage clear vinegar in your hair after shampooing and use to wipe down/spray in your home (dilluted).
If the experiment works for you - you may have some larva to send to the entomologist too!
Please keep me posted on how you get on!
Jo xxx