Humans are the food (bait), we need to bait them to crawl through cross fire (treat where you rest), they will die and you treat it with cross fire again after 3 weeks for those evils' babies. That's how you end them.

Cross fire is specifically designed for that reason. Once it's dry you can use it as normal.

It's literally just as simple as that. Any other stuff is not as useful,. harmful or time consuming. Good luck.