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Interested in making your desktop computer sick real quick? No? Well then why are you smoking near your computer? One way to get your computer to stop working at full performance is to smoke cigarettes while using your computer. Computers have air vents to allow air to flow through and cool down the engine. The part of the computer that acts as a cooling device is called a heat sink. Tobacco smoke is sticky so when it gets inside the computer, dust clings to it easier and that clogs the fans. Over time this clogging will eventually make the fans stop working.