Black Carpenter Ants

[CrawfordCentury]

Borax is what we use at first sight. You'll find it in the laundry detergent section of the department store. It comes in powder form. Sprinkle liberally at points where the ants may be gaining entry.

Use caution if you have small children.

A benefit of Borax is that you can use it in your laundry when the ants are gone. My wife likes it just as good as OxyClean - and it's a lot cheaper.