How do I fight the bedbugs?

Chemical warfare is the usual approach, but I suppose nukes would work as well ;).

Why not just ask them to leave?

It looks like AlbertRose’s OP was eaten by the server, but I guess the question speaks for itself.

This Staff Report may be of interest: What’s the origin of the expression, “sleep tight”?

I’m not sure you really want open containers of kerosene in your bedroom, though.