I haven't tried this yet either because I found it just recently. I do hope it works. The only thing I have done that works is to wait until after a rain when they are busy rebuilding their hill. Take a propane torch and some kind of metal rod and incinerate them along with their eggs which are often found near the surface at that time also. Stir the mound in a circular motion so it churns things upward burning as you go. Watch your feet and burn any off the rod before the reach your hand. I have considered going out on a day when the temperature is below freezing, dig up a shovelful and sling it to break it up and freeze the monsters.