Keep in mind that different ants (depending on species and
the availability of other food sources) may be seeking
"sugary" food but they may be after "fatty" food. In the
latter case, something like peanut butter laced with
boric acid may be more effective.

I've heard it described as "sugar ants" vs. "grease ants".

Same deal, I guess. Ya' gotta' use the right bait.

-Zz