Cleaning computer make me feel so angry

This morning I feel so energy to clean my room. I got my desktop computer CPU with no cover casing. Inside of it got so many dust especially the graphic card and processor fan. I take out my motherboard from casing then take out all the ram, graphic card, and fan. By using all small old tooth brush I manage to clean almost all the dust. All component looks like new. Finally I put all part back together then try run my pc back. Suddenly my CPU not working, no windows appear, my processor fan turn on, I feel angry with sad, I feel like better I don't clean my pc it only turn to worst. I rest for half and hour to figure out what the problem. I still don't get it. I try again, I make sure all computer fit enough. Lucky, suddenly it run like normal..yay. Scary, I will not clean up my computer part again hehe... Maybe other people feel the same situation like me before, maybe I just need to calm down when happen again next time.