They like munching on old food, is there somewhere you have missed where a bit of pizza topping has fallen etc? Otherwise all you can do is spray carpet beetle spray all over and leave the room til it dries (with open windows).
http://www.wikihow.com/Prevent-Carpet-Be...
Did you vacuum under the bed and behind the bed and under things? They go inside the walls during the day and come out during the night.
just get raid insecticide and spray everywhere, problem solved.
I found carpet beetles under my bed, brown hair horrible looking things so i cleaned my room like crazy, i then found more so i steam cleaned the whole room with all furniture moved out then hoovered it twice, everywhere. After that they still camer in so I removed all carpets and put in a wooden flooring, covered up all holes and started cleaning my room every day, it seemed to work but then my hoover broke for 1 week and now there is lots of them back. No matter what i do they come back, I'm going insane right now because it seems if i miss cleaning my room for even 1 day they appear right back again....
