Here in Australia, the warmer weather of the past week has been welcome, but seems to have encouraged an influx of vinegar flies hoping to optimise on the warmth before winter sets in.
If your kitchen is besieged, pour some balsamic or apple cider vinegar into a glass. Add a few drops of dishwashing liquid then cover the glass with plastic wrap. Secure with a rubber band and poke small holes in the top – within 24 hours most of the flies will be trapped and can be disposed down the drain.