Hmmmm! The ants are blowing in the wind?

Well, the trick we used to do in Ethiopia, back in my old Peace Corps days, was spread fresh Eucalyptus leaves around the edges of the room. The Ethiopian ants didn't like Eucalyptus oil, and we really used to have some massive invasions. Now look, gang, this really works!

I wouldn't especially recommend spraying kerosene, like they used to do in the foc'sles of old sailing ships, although you don't smoke.

Cheerily,
Charley Noble