I can say that a head shot right betweent the eyes will NOT work. I tried and then couldn't go into the garage for a month.
We started to drown them, works alot better. If they do spray you can get rid of the scent by dumping the water. But Only 1 sprayed out of the last 10. I put about half of the garbage can full of water with packing peanuts, then float a tin full of tuna in the middle. Works like a champ.
