In the 4 years I've had my worm farm, I've never had a pest problem until today when I discovered fungas gnats in my bin. It's only in one of my four bins - the one that had way too much water in it a month or so ago. Since I've never dealt with this before, I had to do a little research to figure out how to get rid of them.
What I decided to try was fly paper secured in a circle and placed on newspaper to catch them. Believe it or not, I couldn't find fly paper so I had to improvise with spider glue traps.