Clean and dry a ball jar thoroughly to ensure it is free from any residues that might interfere with the trap.
Add the Beer or Wine:
Pour about 1/4 cup of stale beer or wine into the jar. The smell of the beer or wine will attract the fruit flies.
Add Dish Soap:
Add a single drop of dish soap to the jar. The soap breaks the surface tension of the liquid, causing the flies to sink and drown when they land on it.
Mix:
Gently swirl the jar to mix the dish soap with the beer or wine. Ensure it’s well combined without creating too many bubbles.
Set the Trap:
Place the jar in an area where you’ve noticed fruit fly activity. Common places include near fruit bowls, trash cans, or anywhere else they tend to congregate.
Monitor and Replace:
Leave the jar out and monitor it over the next few days. You should see fruit flies trapped inside.
Replace the mixture every few days or as needed until the fruit fly problem is resolved.