There is no questioning when ants have invaded. Once one is spotted, another one is always nearby. And whether they are scurrying across countertops or parading from outdoors to a lone crumb on the floor, getting rid of them quickly will prevent a massive infestation.
To rid your home of ants, bring any containers or objects covered in them outdoors. Clean up any crawling ants with soapy water and make sure all food spills or sticky objects have been cleaned up. However, getting rid of the ants in the house will not stop other ants from entering the house. Use caulk to seal any holes in doorways or trim to block them from being able to enter. To deter ants from getting anywhere near the house, stop plantings and mulch a foot from the foundation so that they don’t colonize there. And if the problem persists, consider using baits outside so that they are deterred before making it indoors.