I have a mass number of huge ant hills in my backyard. how do I get rid of them?

I've tried Raid ant traps(they just build over them),I've tried bay leaves(build somewhere else in the yard) Laundry detergent(nothing). what works really well??

Answers:
I don't think there's anything better than a Scotts/Ortho product. I put a link below so you can read about a product called Ant-B-Gone..it really works!

Ants are roamers, so remember, once you have eradicated the ant hills..there's always next year and more ants will find your lawn!

Other answers:
I use a product called Sevin-5. Its a dust that is ready to use. It ussually cost around $5.00 a bag.
I use a product called Sevin-5. Its a dust that is ready to use. It ussually cost around $5.00 a bag.
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