I've had decent luck injecting then with boiling water. I use a syringe with a medical needle (sharp). Load the syringe up with with boiling water, jab the little rascal right in the head, and fill it up.
I'd say I've achieved about a 25-50% kill rate. The next morning, it is easy to tell which ones you got and which ones need another dose.
I'd say I've achieved about a 25-50% kill rate. The next morning, it is easy to tell which ones you got and which ones need another dose.