Quote Originally Posted by Stacykins View Post
When fruit flies become a problem, I fill up a small cup about halfway with apple cider vinegar and a bit of dish soap, top the cup with plastic wrap and secure it with a rubberband. Poke a few holes in the plastic wrap and pop it near the terrariums. The fruit flies head towards the apple cider vinegar, but get trapped and drown. Really cuts their numbers quickly!
doesn't work very well with phorid flies.