How do restaurants and hotel kitchens kill cockroaches and mice?

Give professional things to professional people to do, and generally you can ask a professional pest control company to handle them.

Professional companies will start with the environment, clean up the existing cockroaches and rats by physical and chemical methods, and tell customers how to avoid the recurrence of cockroaches and rats, and check and deal with them regularly. Killing rats and cockroaches is a long-term and continuous work.