If you have a pest problem, or perhaps want to check you haven’t or check you aren’t going to have a pest problem, then you need to first choose a suitable pest controller. They normally do call themselves controllers now rather than exterminators, for one reason that humane methods are now more popular and because prevention is better than a cure so you may want to protect your home from pests if you don’t have them or stop them from coming back in future. Some pest controllers have specializations for certain pests, this shows that they must know what they are doing but you may want a pest controller who can stop pests of any type whatever you may turn out to have or be at risk from. Many pest controllers will come and give a free inspection, this will either confirm you have pests which they hop you will have removed, or confirm that you are safe, and presumably then they will try to sell you what you need to make sure you keep pest free. For some pest types such as bees and rodent s you will want a quick response and may choose a controller based on this as well but often the best way to choose id to get a recommendation from someone you know and trust.