Thanks again and take care!
Borax has never failed. We just rid of piss ants at the new place we bought. 3 days - boom, gone. I have Borax all over basement now, as precaution, also it went onto several ant mounds we found in the property.
You don't really need sugar, as as far as Borax gets onto them, it's done. But sugar or syrup attracts them. Then they take it back home and to queen, and that's it.