As long as the problem persists, empty out dead flies and add fresh bait regularly. With a few household items, you can recreate this discrete fly trap – which is best for gnats and fruit flies.

The best baits for gnat traps include everyday household ... The most popular homemade gnat or fruit fly trap combines vinegar, sugar, and dish soap in a container and lures the gnats into the ...

Easy Fly Control – This disposable outdoor hanging fly trap gets rid of common flies, including hundreds of the most prevalent species. Once the trap is full, simply discard—no mess!