This one feels like a medieval siege. You boil a big pot of water and pour it directly into the nest entrance. It’s satisfying to watch, and it will kill a lot of ants instantly. It’s like a scalding hot tsunami hitting their underground city.
But here’s the catch: nests are complex. They have tunnels that curve, branch, and lead to deep chambers. Boiling water only travels a short distance before it cools down and gets absorbed by the soil. The queen, tucked away in a dry, deep chamber, might just survive your liquid assault.
It works best on small, shallow nests. For a big, established colony? Consider it a morale blow more than a knockout punch.