I don't know where to find Steinernema, but used Sciarid Kill (from http://www.nutriflo....ases/Pesticides ) and a few yellow sticky traps to wipe out a very bad Fungus Gnat problem I had.
Only took 2 drenches (about a week apart) and then around a week later.....no sign of them.
Thanks mate. Just bought some. Hopefully mine goes away too. I have so many they have started coming inside the house.