If they really are fungus gnats, your problem is that you have too much moisture somewhere. They breed in sodden medium.

There ARE ways to clean out bugs out of the soil... Google 'soil drench'.

Another way to go is set off 2 bug bombs 3-5 days apart to kill the exposed life stages of the pest. The second one kills anything that was still in egg form and was protected by the first one.
stinkyattic Reviewed by stinkyattic on . Bugs. I am using a compost with cow crap ( Stinky put me on to it.). I keep getting gnats in the soil I was wondering what would be a good way to get them out of the soil. If there is some thing that I wouldn't have to run to a hydro store. The closest one is 90 miles away .... Please Help Rating: 5