Thanks for the vanilla tip, I just used it--there was a fly buzzing around the room I'm in for the past half hour and I brought out the bottle of vanilla, poured a little in the lid, put a few drops on a piece of paper, the room smells of vanilla now and fingers crossed the fly is gone....
They have flies in the White House too:
What Has 132 Rooms and Flies?
By MARK LEIBOVICH
Published: June 17, 2009
The White House is bugged!
No, not like that. But actual flies are swarming the place, confounding housekeepers, irritating aides, even trying to feast on the president. During an East Room interview with John Harwood for CNBC and The New York Times on Tuesday, a giant fly orbited Mr. Obamas head.
http://www.nytimes.com/2009/06/18/us/politics/18fly.html
They have flies in the White House too:
What Has 132 Rooms and Flies?
By MARK LEIBOVICH
Published: June 17, 2009
The White House is bugged!
No, not like that. But actual flies are swarming the place, confounding housekeepers, irritating aides, even trying to feast on the president. During an East Room interview with John Harwood for CNBC and The New York Times on Tuesday, a giant fly orbited Mr. Obamas head.
http://www.nytimes.com/2009/06/18/us/politics/18fly.html

I still have ants and not much cinnamon. 
but this has worked.

I have 6 of the tree air fresheners all over (house smells nice.) I am not convinced they don't work though, the flies seem to be acting crazy. But like my DH said, where are they going to go? I said they got in, they need to GET OUT! We have not found where they came in other then jsut the doors opening and closing but there are so many! The fly papers are collecing many but there are still pleanty. I warned DD15 that is she has the sleepover to warn the girls so they don't go telling people our house was gross or something (it's clean, just buggy!) But she said she told them and they all said they are having the same issues at their houses. So, it must be a bad year for them. 