What DIY products can actually do
Over-the-counter termite sprays and repellents can kill visible termites on contact and offer short-term relief for a small, localised sighting. For someone who just wants to deal with a handful of visible insects immediately, they are not useless.
Why they rarely solve the real problem
Subterranean termite colonies live in the soil, often several feet from where you actually see activity, with thousands of individuals protected underground. Surface sprays do not reach the colony or the queen, so the infestation typically continues out of sight even after visible termites disappear.
The risk of disturbing a colony without proper treatment
Spraying visible mud tubes or termite trails without treating the source can cause the colony to relocate and spread further into the structure, making the eventual professional treatment more extensive and expensive than if it had been handled correctly the first time.
When to call a professional
If you have seen mud tubes, hollow wood, or discarded wings anywhere in the property, it is worth getting a proper inspection rather than relying on DIY products alone. A free inspection can confirm whether this is a minor, localised issue or a colony that needs full treatment.
