I came back from overseas about 10 days ago and there was ants swarming some cat Puke. So I cleaned it up and we drew a line with an ant chalk pen outside the window. But now there is no food for them. But they come back daily. And the window had a poisonous chalk line. How are they getting in? Are they living IN MY ROOM?! :( please help. Ants make me feel itchy and uncomfortable. And frankly they scare me.