When I was a kid in the mid-60’s, we lived in texas. We had a sugar box above the fridge that turned out to be full of ants. When we traced the trail, it went out the back door and to a path they had created dirt path through our back yard lawn and down the alley to the point where we just stopped following. it.
In our current home (KY) last week we noticed some very small and dark ants in our bathroom. They would show up in ones or twos until a few days ago I noticed a few by the charger base of our electric tooth brush. When I picked it up it turned out there were thousands of them in it. I rinsed it out and they just kept coming. It was amazing that there were that many in thre.
I figured the electromagnetism must have somehow attracted them. For now the ant problem has completely disappeared.
It may be that they are attracted to the acids...............