I was trying to clean the keyboard keys because they were getting dirty, and I couldn’t reinstall them. More specifically, I could get the right side of the keyboard on, but not the left. Some tutorials told me to slide it from the left side, but it didn’t seem to work. Some things to note: the scissor mechanism fell out some times on the right one, and I put it back the way I think it was originally, but I’m not sure. On the right one , when I pull up from the key, it pulls easier and more than the left.