Of all the preventive maintenance that gets overlooked, cleaning PCs inside and out is the worst. Dust, moisture, salt laden air, rust, pet hair, cock roaches, ants, geckos, coins, and loose screws have all contributed to countless computer failures in the past. These foreign objects can cause heat issues or outright short circuits which will render your computer completely useless. While disconnecting your computer for a good cleaning is not exactly fun, it is vital to your computer’s long term health.