Odorous house ants are relentless once they find a good food supply. Their scent trails will lead thousands of foraging worker ants if left untreated. The Gel Baits used inside will help but in most every case you'll need to treat the perimeter with a good residual like Optigard Flex. This product will last long and won't be detected by the ants walking over the treatment so it will be able to impact the entire colony as our Ant Control Article explains. Apply this around the entire outside and inside of the home using a good Pump Sprayer and you should get positive results in less than 2 weeks.