Most exterminators have experience in dealing with all kinds of pests, from bedbugs to snakes. There are five different varieties of roaches in the area. The most common type of roach is the German roach. Luckily, these pests can usually be exterminated with an application of chemicals. The exterminator says that as recently as a few years ago, many people were able to handle pest control for themselves via powerful chemicals that used to be available over the counter. Recently however there has been a change in procedure and the government's regulatory pest control board is making some changes to the law. Nowadays, any pest control agent must be certified as either a technician himself, or a person working under a technician's watchful supervision.
The chemicals that were once freely available are now heavily restricted. The pest control industry has had problems with apparent exterminators treating homes for $100 and just using questionable chemicals such as kerosene. In the past there were many "exterminators" who had no clue what kind of chemicals they were using. They would sometimes mix different chemicals together in an effort to double their strength. In the past chlordane was a chemical used as standard in the industry, however due to the ill use of the chemical it has since been banned. As they are dangerous in the wrong hands, chemicals prove to be much like a fully loaded weapon, which is helpful in the hands of the right person.