Using a can of compressed air, gently blow out the dust. Do this outside for better results and blow in the direction of the wind. Compressed air may not be able to fix all the problems, If your fan is over 1 year old and still does not run correctly after you tried using the compressed air, the fan will need to be replaced.

Do not attempt to clean the fan while it is still installed in the laptop. The fan and its surrounding components are extremely easy to break.