I just spent about 30 minutes swatting fruit flies with an electric flyswatter.

I have no idea where their coming from but they suddenly invaded my bathroom and it means war!

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Take a microwave-safe bowl and fill it with apple cider, add a couple of drops of dish soap, then zap it for a few seconds before placing it in your bathroom. The soap will create just enough surface tension that the flies will try to land on it, and they'll drown.