I'm ashamed to say ants have taken over my kitchen. Can anyone help? I've tried pouring boiling water outside, Nippon ant powder inside and cinnamon. None of it has worked. I think the nest is inside. I spotted a load of ants going behind a tile - it seems they have a passage to my bathroom as some have appeared in there as well. They are small black ants. I think they came inside when I bought some vegetable cuttings in but can't be sure.