ANTS

I don't know where they are coming from, but about every other day I am finding ants. No trail of where they are coming or going, just a big clump of little tiny red ants so small if there wasn't so many, you wouldn't see them. I know last summer after the garage burned down they did and ozone treatment to the house so everything living including mold or spores, ants or spiders were destroyed. So why now am I being invaded. This is like every other day. I should have shares in the bug company.