I read somewhere about using vaseline to deter ants. I applied some along the door frame of a trouble spot in my home–the ants were coming in through little cracks between the pieces of frame! I watched as several ants would not cross the semi-sticky vaseline barrier. I did caulk the area as best as I could, but I know the vaseline helped keep the ants at bay as well. I applied some in my cupboards recently when I found a few stray ants in them. I like how the vaseline is clear and can’t be displaced as easily as remedies in powder form. I simply apply the vaseline with a cotton swab that I’ve dipped in the vaseline jar.