/Dr. Hibbert voice: "FIRE, and lots of it!"
But you have to admit, they are really intricate creatures. And they are not insects, but true bugs. You can look that up.
I used to kill them one by one and put their little heads on a spike and leave it out for others to see, but that didn't work. I tried chemical warfare and would spay like the US Government spaying for Charlie, but the little SOB kept coming. Now I'm just nuking it from orbit (hair spay and a lighter), it's the only way to be sure. My window sill looks like the highway of death.