In this guide I explain how to replace thermal grease on a MacBook Pro.
You can use the following instructions for 13″, 15″, 17″ unibody MBPs.
When you remove the bottom cover you can access and clean up the cooling fan but the heat sink is mounted on the other side of the motherboard. In order to replace thermal grease the motherboard has to be removed.
In this post I will guide you through the keyboard replacement procedure on a liquid damaged 11″ or 13″ MacBook Air.
In my case a little bit of water was spilled on the lower right corner. After that some of the keys stopped working but the rest of the laptop worked just fine. I was able to use it with an external USB keyboard.