Thanks for asking this T.! I'm in a similar situation and we've had a pest control company come every 3 months since we've moved in and it is not helping. I have a cat and a dog so having pets doesn't keep any pests away. IN fact I've found it has the opposite effect.
Also a word of caution about boric acid, yes it can be effective but it is extremely toxic to kids and pets. You can't use it anywhere that will come in contact with food, kids or pets. So that always made me nervous. I've used it under the cabinets mixed with sugar and it only helped marginally. We've also used Demon ourselves and that only helped a little. I've read that you need to use 3 chemicals and traps in order to get rid of them. 1 chemical that kills them, 1 that sterilizes them and then the traps as extra security.
The combination of pest control and traps has helped but I don't want to control the problem I want to eliminate it!
So I think I am going to check out ABC Pest, Pool and Lawn since someone recommended them. I think that we just need to find a pest company that will guarantee to get rid of them!
I hope you are able to get rid of yours too!