The answer to 'how to kill pest' is to use a combination of prevention, exclusion, and targeted treatment methods. Start by identifying the type of pest you're dealing with, then use the appropriate control methods to eliminate them safely and effectively.
For common household pests like ants, cockroaches, or mice, try setting out traps or using baits according to the product instructions. Make sure to seal up any entry points and eliminate food sources to prevent them from coming back. For larger infestations or more difficult pests, it's best to call in a professional pest control technician who can assess the situation and provide the right treatment plan.