Last year it was so bad that I ordered something called the Texas Two-step. The first container has a birth control food that you sprinkle around the mound. The ants take it to the queen and she stops laying eggs. If that doesn't totally work the second container has a poison powder as a follow up. I treated 56 hills in 2023, and this year have only seen one hill here or there, haven't needed more than the first "step". It's great, I can walk my dog in the yard without getting stung.I've got over 4 acres here to police for fire ant mounds. It keeps me busy. I think the things that say they will kill the queen doesn't to the job for somehow there are some of the workers that are equipped to create another queen in another nearby location. If you don't catch it soon they have spread out into another dozen mounds.