Joanm, if you follow the directions on the box of stakes for the Grants Ant Stakes you will find that it works best if you run hot water over them and stir them up through the little hole with a nail or a toothpick to activate the contents.
If you are indeed swamped with ants, it works best to place them at most every six feet around the perimeter of your house, barn, etc. Then give it a week or so to work.
Good luck!