we had ghost ants and I can tell you any of the do it yourself applications do not work. Unless you have been on your hands and knees with a flashlight to see where they are coming from you won't get rid of them.
Where you see them is not where they are from. They get in from any crack (almost invisible ones), wall plugs, around door openings. It is not unusual to see them in one place in the house and have a trail several yards away to the opening to their nest. And until the queen(s) are killed they are not eliminated. You will be very surprised how far they travel from where they come in the house to where you actually see them!!!!
I finally had the folks who do our monthly bug prevention come in. I showed them the "trails" I followed. They then proceded to dust/bait every plug anywhere near water any where in the house/garage. They treated every door opening.
After the treatment we have never seen another. He did identify them as ghost ants.
btk
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