The answer to 'how to kill rodent' is to use effective and humane rodent control methods. This typically involves a combination of prevention, trapping, and exclusion techniques to eliminate rodents from your home and prevent future infestations.
Start by sealing any entry points or gaps where rodents could get inside, such as cracks, holes, or openings around pipes or wires. Use steel wool, caulk, or other durable materials to block these access points. You can also place traps in areas where you've seen signs of rodent activity, such as droppings or gnaw marks. Check and empty the traps regularly. Avoid using poison bait, as it can be dangerous for pets and children. If the problem persists or you have a large infestation, it's best to call a professional pest control technician who can assess the situation and recommend the safest and most effective solutions.