Science-Based Methods
The point of an inspection is to find out why the pests are there. Ants following a moisture line, mice using a gap around a pipe, termites working up from the soil: each has a cause, and a treatment that ignores the cause only buys a few quiet weeks.
So the work starts with identifying the exact species, then choosing a targeted treatment for it, then scheduling follow-ups to confirm it worked. That is the whole method, and it is why the company talks about investigating instead of spraying.
Read the four steps

