[scarmig]

The goal isn't to suffocate them, but to draw them into a trap--they're attracted to CO2 because we exhale it. Over time, the hope is you trap and kill the entire population.

I think it'd work for mild infestations, but for larger ones the heat method is really the only option.

[fbdab103]

I suppose that seems much more plausible, if significantly less cool, ahem, than making a low hanging CO2 bath.