The answer to 'how to kill cricket' is to use a combination of baits, traps, and targeted insecticides. Start by sealing any cracks and crevices where crickets may be entering your home, then use bait stations or traps to capture and eliminate them. For larger infestations, apply a targeted insecticide spray in areas where you've seen crickets. Be sure to follow all product instructions carefully and take safety precautions, such as wearing gloves and ventilating the area.
If the cricket problem persists or you're uncomfortable using pesticides, it's best to call in a professional pest control technician. They have the expertise and specialized equipment to safely and effectively eliminate a cricket infestation.