Make an ant bait station if you are using the liquid from a bottle. To do this, mix 3 cups of water to 2/3 cup of the Terro-PCO liquid. Put about a teaspoon of the mixture onto a scrap of cardboard. The cardboard can be of any size as long as it holds the bait.
Place the ant bait station along a wall and as close as possible to where the ants are entering and traveling through the room.
Use an ant bait station for about every 2 feet of ant trails. You may need to adjust the number of ant bait stations you use depending on how many ants are coming into the home. If a single bait station is overrun and depleted by ants within a few hours, then put out a second station next to the first one.
Leave the ant bait stations in place for up to three months. If the ants eat all the bait before three months, then replace as needed. Once you place the bait stations out, you should expect that the ants will be gone within about three days. If you still have ants in three days, you need to put out more bait stations.