Many people do not clean their fans on a regular basis until those fans stop working. Of course, when that happens it might be too late to clean them, as that will not help. Your fans are spinning constantly when your PC is on, and that is why it is important from time to time to remove dust from those fans. Some fans can get very sticky if they are never cleaned. Most computer users report that compressed air is excellent for cleaning various computer components, including fans. Compressed air is able to remove any dust from fans in just a few seconds. In most cases, you will not even need to use a damp cloth, as compressed air will do all of the job. You can also consider installing a fan filter that would be able to protect your fans.