The answer to 'how did termite treatment get in my house' is that termite treatment chemicals were likely applied incorrectly or incompletely by a pest control professional. Termite treatments involve applying liquid or foam insecticides around the perimeter of the home and in any infested areas to create a chemical barrier that kills and repels termites. If the treatment is not applied thoroughly or reaches areas inside the home, it can lead to the chemicals being present inside the house.
Some common causes of this issue include improper application technique, not treating all necessary areas, or the treatment not being deep or complete enough to create an effective barrier. Symptoms may include a strong chemical odor, residue or staining on surfaces, or even skin irritation from contact with the chemicals. The best solution is to have a professional pest control company re-evaluate the home and re-apply the treatment correctly to ensure it is effective and contained outside the home.