I had the same problem and it was horrible because i hate ants! I would vacuum about twice a week, make sure there is NO food even in the trashcan (if you have it in your room), put sealant in the corners of your room (because thats how they get in most of the time) and use ant killing trap poison things because believe it or not, they work. Good luck!
watch to find out where they are coming from
I've had many ant invasions in my room. I understand that this stuff will happen and I can handle once every 3 years, but these ants keep comming even though there is no food or anything for them to surrvive on, and just crawl on my things. Gives me the creeps. Also they have crawled on my neck, arms, leg, slippers, because there is no food. They have invaded 15 times in one year. I have gotten rid if them 14 times. But they keep comming back. Please I need to stop it, because I'm getting annoyed by these invasion when most of the time there nothing. I've had food once, but they were already in my room before that. Why do they invade my room so easily?