The most effective ant killer is a product called Termidor. It can be used indoors or outdoors and comes in a liquid or foam form. It is odorless, so it won't bother you, and it will kill ants on contact.

There are many effective ant killers on the market, but the most effective one is likely to be the one that is specifically designed to kill ants. Some of the most popular brands of ant killer include Terro, Combat, and Raid. However, it's important to read the label carefully before using any ant killer, as some products may be harmful if used improperly.