I have a pretty bad ant infestation. I think the little critters are Argentine ants. I've used a couple of bottles of Terro (I usually put down about a quarter bottle at a time). It does slow them down, but they come right back not after not too long.
I have been thinking about using an aerosol insecticide. The stuff I have has imiprothrin and cypermethrin as active ingredients. The are supposed to be good enough that I can just spray on their trails, and they'll die if they walk over the sprayed areas.
The problem is the location of the trail. They're coming out from a space between the baseboard heater and the wall's outer finish.
Can I spray the baseboard heater? I'm not worried about fires, but I'd really hate for the insecticide to start outgassing when the heaters get turned on this winter.