Step 2: Clean the fan

Picture of Clean the fan
Now for the fun part, everyone has their own methods, and depending on the build up it may need anything from a blast of air from an air compressor to soaking it to remove the caked up gunk

This isn't something I recommend doing a half-ass job on, as you'll only be taking it apart a month later because all the dust you left on the fan will collect even more dust, especially if it's still wet when you start using it again.

I myself soak the fan blades in a secret blend of hydrochloric acid and rubbing alcohol (I'm only joking about the former).
ewww.... that's dirty... LoL