The best way to kill ants is with an insecticide that has two active ingredients: a carbaryl and a pyrethroid. However, some professional ant killers use pesticides such as borax, lindane, malathion and permethrin that kill ants by affecting their nervous system or disrupting the digestive system.
Professional pest control companies can also use other methods such as getting rid of the food supply for ants or using ant bait stations in places where ants frequently infest homes like kitchens and bathrooms.
They also use liquid baits, gel granules, and liquid sprays. Liquid sprays offer the most effective and long-term solution for killing ants.
Liquid baits will kill off an entire colony in a short amount of time. The baits work by luring the ants to come into contact with it and eating it, which ultimately leads to death.