very very small flies in the basement
I'm finding very very small flies in my basement. The ones I find are mostly dead. So far I've found about 20 and have killed about 10. Never had these until about two weeks ago.
I am scared to death what this might mean. I have seen these flies in two instances before. First was at my parents house where a sewer pipe cracked leading out from the bathroom. The waste water was collecting under the house. We had these flies infest the house for about a year until the pipes were fixed (we found the pipe issue during the remodel). Did not realize they were connected.
Second was at my friends house mile down the street. He had to vacuum up a lot of these dead flies and couldn't figure out where they were coming from. He was refinishing his basement when he discovered that the kitchen waste water pipe had pretty much rotted away. It was draining into the soil. Once the pipe was fixed, the fly problem went away.
I redid my basement including digging the foundation to add a new bathroom in March of 06. But I have only seen these flies for the past two weeks. I am worried what it might mean.