I have located a carpenter ant nest in my window frame. I opened it up and can see lots of ants and eggs. I injected Combat ant bait which has the same ingredients as MaxForce which has a good reputation.
The ants are taking the bait and dropping it off the side and down on my baseboard.
I chose to do this rather than spray since I'm not sure this is the main nest and I want to be sure the queen gets the poison.
Has anyone else had this happen? Could this be because I injected directly into the nest?
Me, I'd call a professional exterminator. I'd much rather have a pro get on the problem quickly rather than waste time trying to figure it out. It's one thing to deal with a few bugs here and there but when you've got an infestation that's already doing a lot of damage? You want that stomped out RIGHT AWAY. And in theory a pro's going to understand how they got there, where else they might be already present, and how to tackle the problem on a larger scale.
At this point the exterminator will probably be the least expensive part of this, they'll want a few hundred bucks... then you've got to open up your walls to fix damage, that's where the money comes in.
My advice is based on anecdotal knowledge or personal experience. I'm not a professional no matter how matter of factly I may say something