I don’t leave food out. Garbage gets tossed, counters are cleaned. I replaced half the windows in my home and caulked up the rest. I bought a salt gun and have been picking them off but there’s always more.
How do I figure out where these little fuckers are getting in?
I used to have lots of flies and noticed one summer when I put tin foil in the windows to cool my house down, I stopped finding flies inside completely. Maybe because it made my house dark, they didn’t want to come in anymore? Idk, but I’ve been gloriously fly-free ever since. You’ve mentioned you have a basement—do you find fewer flies there? I suspect they might avoid dark places.