ants

I hate ants!!!! There is never just one and this year they are relentless. First one room then the next and just when I think they are under control I find them in another room. Terry has sprayed around the house more than once but I think they have a colony under the house now. A friend said to throw a fog bomb of ant killer under the house. Does this sound safe? Does this sound like it will work?? Any suggestions??