Roach is back, and getting worse

Remember I said before that I have never seen roach on the second floor of town house that I lived in? Well I woke up this morning I saw a huge roach died right in the middle of room, right on the carper between my computer gears and my bed. Also worth noticing is that my room's right was on. So the roach no only came to the second floor, it also doesn't care much about the light.

I guess something is not right here, and some serious action has to be done. I don't quite understand how come all roaches were dead (or near dead when I discovered them, but that's just enough horror for me to deal with everyday.

I will probably need to spary on the door again, but since the ex-roomtate of the house owner is here, so I probably need to wait for a few more days, wait until after he left, and then I will spray the door again.

Maybe it's also about time for me to look for another living place.