I'm going to assume you want to get rid of them quick, or kill them, right? Brake Cleaner will do it. I've used brake cleaner to kill wasps, drive out wasp nests, kill dirt dobbers (shoot them right of the air), kill roaches and kill grass snakes. It takes a few minutes, but it will do it. Just keep shooting it out of the can at them. They don't like it at all. Neither do rats or possums. I buy it by the case. It won't hurt your truck, evaporates pretty fast and the smell is gone in several minutes. I use CRC brand in the RED can - get the RED, not the green. Less then $4.00 a can.
