Today I really wanted to repaste my PS3 (25XX model) and pretty much everything went wrong. I thought I had canned air when I didn't, I only had mere drops of isopropyl alcohol left. On top of that, the PRAM battery's slot gave up, and I had to jam the battery inside of the slot by using tape around it.
To my surprise, not only it seems to be working, but I also shaved pretty much ~20°c from the CPU and GPU while in-game (tested with Gran Turismo 6).