Berna we get tons of ants in the summer, i have always used talcum powder ( baby talc,smells lovely )
Follow the trail of ants to determine where they are entering the home. Locate the hole, making sure that you've found them all.
Apply Diatomaceous earth, which is available at most convenience stores as baby powder, to the holes or cracks which the ants are using to enter the home. Most baby powders no longer contain Diatomaceous earth). The ants on either side will not cross the line of baby powder. Ants that come in contact with the powder will die almost immediately.
Check to see that the ants are no longer using the hole. If they are, apply more baby powder and check the trail to be sure you found the right hole in step two.If the ants are no longer using the hole and they start to scramble around, you've broken the chain of ants leading from the colony into your home.
Kill the remaining ants by sprinkling the baby powder on them. After they're dead, sweep away the ants and excess powder. :laugh: