Mozzies are attracted to us humans because of our body heat and the carbon dioxide we exhale. That is why your Quash will work best to clear a room of mozzies when you aren't in it. We recommend that you run your bug catcher for 2-3 hours BEFORE bedtime with the lights and fan off and the doors/windows closed. Place the trap away from a flow of air (eg. not directly under the A/C unit) if possible. You will still see some results during the night if you position it at least 1m away from your bed, but for best results use it to clear your room before you enter.