Black MacBook hot after replacing top case

[lamina]

Since I replaced the top case on my MacBook, the fans have been running pretty darn high. The CPU reports around 61 degrees celsius. I was careful not to touch anything else except what I was working on.

Of course I looked around and stuff. The inside of the computer is almost as beautiful as the outside. Could it be possible that I touched the heatsink and slightly ruptured the cooling grease?

 

[l.a.rossmann]

The cooling grease is more like cooling cement. It is rarely applied well.

I'd try cleaning the bottom of the heatsink and the CPU/GPU with a toothbrush, then q-tips using 91% isopropyl alcohol until there is nothing left on the q-tip when you wipe the heatsink/chip. I rarely use the toothbrush, but with the excess that gets put on the macbooks, it's a standard step.