Termites returning to your home after a pest treatment does not mean that you have been scammed or that your pest controller did a poor job. Even if termite professionals build an impenetrable chemical barrier that goes deep in the ground, termites sometimes still find their way back to your home. The best way to reduce chances of termites returning to your home is to call a professional pest manager who will give you a full guarantee.
All chemical products that termite control professionals go through testing and should have passed extensive tests before they can be used for termite control. All products used by pest exterminators pose no health risk to humans and pets.
Most pest controllers advise applying treatment to the whole house in order to achieve best results and diminish the chances of a termite infestation reoccurring. Underground termite colonies can have thousands of termites that go in all directions. Applying localized treatments can be a gamble and there is a high chance that termites will emerge somewhere else again.