Ants leave a trail which makes it easier for other ants from the colony to find their way to food. To wash away the trail, use a solution (https://ridit-pestcontrol.co.uk/professional-rat-control-stoke-on-trent/) made from 1/4 cup white vinegar, 2 cups water, and 10 drops of peppermint or eucalyptus oil. Some oils can also be used to clean furniture and fight odors as well.