Exterminators employ a range of methods to eliminate rats: installing exclusion barriers to prevent entry, using traps to catch live rodents, and deploying rodenticides to kill them. They also focus on sanitation and hygiene to eliminate food sources and breeding grounds. Pest control professionals work closely with property owners and tenants to implement comprehensive rodent control programs, while industry suppliers provide essential equipment and supplies. Regulatory agencies ensure proper use of chemicals and educate the public on best practices.