Can`t help with electronic thing but when I had an ant problem I put the ant bates and more importantly what you can do is put a barrier around your house so the insects can`t come into the house in the future. It`s either a bug spray barrier or some type of dust/pellets all around the perimeter.
the electronic repellers dont work. it's much too weak. you wont have bugs on your outlets, but that's about it. dont worry about the bugs. you will get spiders soon and they will take care of them.