Over time, dust and dirt build up inside your laptop; thereby, restricting airflow, increasing heat, and putting a strain on your laptop’s fans. A hot laptop is not a happy laptop. In fact, most modern processors (CPUs) reduce their clock speed when temperatures get close to 80C (think of it as a “survival mode” for your CPU), which is generally accepted as the highest temperature you should let your CPU reach. The dirtier the airways in your laptop, the quicker your CPU’s temperature can jump to dangerous levels—especially when the airways are further restricted by a pillow, your jeans etc.
To help stop your laptop overheating, consider clearing the channels by which air is designed to flow through your hardware. This guide provides a few tips to help you keep your laptop’s airways free of dust and dirt.