LogFAQs > #913863072

It's just dirty. Take it apart and clean it. Good luck pulling the fan off of the motor without breaking it, though. Some fans are easier than others to take apart.

I wouldn't recommend this to beginners but the method I use is to just take the fan blade and the motor (separated) and run them under hot tap water. You'll usually see a bunch of filthy water for a few seconds. The next part is the most important part, you have to rinse it off with distilled water and then soak it for a bit in some more distilled water. Dry it in front of a fan for at least a few hours, then put a tiny bit of oil (WD40 is usually fine) on the parts that make contact between the two pieces (not directly on the magnetic part).

I've fixed dozens of fans in numerous devices doing this. If it still makes noise then the plastic has probably worn down in a bad spot and there's nothing you can do but replace it.
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