Trap for Mosquitos

Thanks to my friend Javi, currently researching somewhere in the middle of Finland.

I forgot to close the windows when I went out today, so when I came back my house was filled with mosquitos among other light-chasers. Ever happened to you? Now I can't sleep in the whole night because of them.. shit. So here's the trick. You put switch off the lights on your room, switch them on on the hall or whatever is next to your room and left the door open. You go back to the laptop and watch a movie for a while. Then close the door and switch the other light off. You've gotten a room free of mosquitos for a night...

Yeah, trivial... It took me 19 years before Javi told me... I didn't get to figure it out on my own...