I've got a Crematogaster colony in a Talus that has about a dime-size spot of mold out in the foraging area. I've been trying to get them to move into a Mini Hearth so I can clean it out and because I think that would be a better nest for them.
I gave up on my previous attempts to move them because they're pretty stubborn. I've got a heat lamp on the MH, darkened, food in it while there's an ice pack on the Talus, been blowing in the nest, harassing them with a wire, but they haven't budged. Any other suggestions?
What about placing a few drops of alcohol or H2O2 on the spot of mold and let the ants stay put?