During a boring Sunday, I decided to open up my laptop and see if I could clean its CPU fan. I started removing the screws and saw that there are really a lot of screws. After finally removing everything and taking photos of wire connections that I feel I would somehow forget how to put back, I realized that I couldn’t reach the fan because further disassembling my laptop would make it nearly impossible to put back. So I put all back together again. In the end, I felt great joy that it still works.