HOLY HELLS, IT WORKS!
Half lemon juice, half water. Spray it where the ants are. They go away. (Mostly. And it's only been a few minutes, they might come back.)
*crosses fingers*
ETA: A few hours later, I still see the odd straggler, and they're massing about on the floor and by the side of the printer, but no longer on my desk where they were streaming through thick and dark. Yay!
*crosses fingers*
ETA: A few hours later, I still see the odd straggler, and they're massing about on the floor and by the side of the printer, but no longer on my desk where they were streaming through thick and dark. Yay!