I read different pages on this and some suggested if you find the ants or termites going into the walls to drill holes in the walls and pour the solution in the holes. I thought about that and who wants a bunch of huge holes in their walls. A person could fill a meat injector syringe with the solution and drill the smallest of holes and the inject it into the walls. Doing this will only cause a nail sized hole which can easily be filled with toothpaste and painted over. The ants and termites will build nests in the walls I know for fact from remodeling our house and it can make them almost impossible to get rid of.