Bests & Worsts Reviews from Amazon

I have these little black ants that cannot just walk into the newly designed box, so I thought of building a paper ramp for them. But that was actually unnecessary because they can easily crawl up, and ignored my ramp (see picture). A few years ago in my old house I used Terro once and the ants never came back after a week. This time, however, I encountered the problem of ants keep coming back. They would be completely gone for 2-4 days, and a new batch seemed to come in, sometimes in greater numbers. I was worried that they are immune to this bait. After 2 weeks of this happening, I got so angry and fed up that I got an ant container (that professional ant keepers like AntsCanada use to keep ants alive with water and air in a test tube) and I grabbed 2 ants that have their abdomens filled with Terro Liquid Bait and 2 ants with abdomens not filled. Note that I don't know when they started eating the Terro because I discovered these ants in the morning, so they started eating sometime at night. When I put these 4 ants in the test tube container around 8am, they were all alive and kicking. After 3 hours I checked, the one with the fullest abdomen (you can tell because the abdomen had the black shell stretched out a bit and you can see the terro liquid inside) was dead, while the other 3 were still alive. After 6 hours, the other 3 were considerably slower. Around 4pm (8 hours later) I checked again and they were ALL dead. Even the ones without full abdomens. So this experiment ruled out the ants being immune and happily feeding and growing on Terro. IF YOU SUSPECT THAT YOUR ANTS ARE NOT DYING, I recommend YOU DO THIS EXPERIMENT AS WELL: just capture a few and put them in a container that you can observe them for 24 hours. If they die, then the bait is working and you are having some other problem with the ants coming back... This leads me to the final question of what is making the ants come back, and come back in batches too? I have a few theories. Some ants take a few months to develop from eggs, so they could be eggs that are hatched after the previous workers died. Or it could be a massive ant colony with multiple queens or multiple colonies so each time only a portion of their colony(ies) discover and consume the bait. Since there are the rest of the colony finding nontoxic food for the queen(s), thus the queen(s) stay(s) alive longer. Therefore, my ants problem is not completely resolved, but by the experiment it proved that Terro is doing its job of killing ants within 24-48 hours of consumption (in my case, within 10 hours). So I will keep putting Terro out there. P.S. I also taped Terro ant sticky traps around the ant entrance because they came out in the dining room and I want them to keep contained in that small corner with the Terro liquid bait. Sure, a few crawl out from up the wall, but the majority is contained in the corner. P.P.S. I also tested the efficacy of Terro Liquid Bait. Before I placed Terro Liquid Bait, I first put a piece of ant's favorite sticky sugar candy and some food down for a few hours. They loved it. But within an hour of putting down Terro. They all, except 2 smart ants, went into the Terro Liquid Bait. (In the photo, the ants on the sugar candy are DEAD ants that got stuck onto the candy.) P.P.P.S. I put a 1 start here to get people who had my problems read the review (and with about 14k/17k reviews being a 5 star, a 1 star would bring more contribution to people who need answers to the 1 star problems). The ants are still not completely gone even though Terro does kill ants.