I'd put them in my car so the sun would bake them.
What made you think of this?
I saw it in a movie.
While movies tend to not be truthful, it is okay to try things out to see if they work. It could work and make your life better.
I'm going to bake the cockroaches in the sun when I get home from this situation.
Well, I did not know that you were baking cockroaches and I think that most people will agree that this is a bit of a questionable and immoral thing to do. You should try showing a little bit of respect to everything, even roaches.