I had ghost ants coming into the kitchen through the cabinet area to my refridge. I first wiped down the area with vinegar like you did, then sprayed with ant spray along the ant trail. When new ants appear to find their way back I would squash them for a period of an hour. Then I went to Publix and bought ant killer in gel form that I placed in the ant path. I never saw the ants appear again and it has been months. Then I sprayed Home Defense from Lowe's all the way around the house and saw dead crickets, roaches, etc. all around the house and also sprayed external outlets and pipes and window sills. So far only millipedes get in so I'll try salt as suggested by someone.
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