Unwanted fruit flies in my bin
I started a worm bin about 4 or 5 weeks ago (if I remember correctly). My bin is made from an Igloo ice chest, over 2 feet long and probably a foot and a half tall. I leave the lid on, so it is totally enclosed, and it sits on my balcony (I'm an apartment dweller in the city). I currently have many healthy adult and juvenile worms, some of which hatched from cocoons pjames sent me, and some of which I got from my local nursery. I don't have a huge amount for the size of the bin right now (maybe a few hundred, but its really hard to tell), but they seem to be consuming a lot and multiplying quickly.
Last time I opened the bin to check the moisture content and add some scraps, a lot of fruit flies came flying out at me. Because the bin is on my balcony, a lot of them flew straight into my apartment. I would really like to NOT have flies living in the bin for this reason, even if they are helping decomposition. Is there anyway to keep there population under control? Since they are already well established in the bin, am I likely to have a permanent fruit fly infestation? As the worm herd grows, will this cut down on the fly population?