Seen folks use gasoline to flush them out...by simply spraying it around them, down holes etc...Go mow, weedeat whatever around your place wearing snake chaps, a small Kaiser blade would be sweet, make a clear killing field completely around the place....
I think Id mix the gas with some diesel or kerosene to cut down on fumes though...after you clean out from around it start spraying under your place...
I'd bet simply mixing some Sea Breeze, Ammonia with water in a very strong solution would flush their asses out or what we call FL Water and not be flammable....


Grumpy Old MS Bastage