I originally wrote this post in 2011. A lot has changed since then, so this post is entirely new.
A few years back, someone on a listserv I follow was having laptop trouble. CPU spiking, freezes, the works. We ran through the usual suspects: malware, software conflicts, hardware conflicts. None of it fit. Finally, I asked him to hold his hand near the vent and tell me if any air was coming out. It was not. The fan had died. He had noticed it sounded louder lately but never connected the noise to the freezes.
The fix was a cheap part and a competent repair shop. The cause, though, is worth talking about, because most people never think about the physical side of computer maintenance until something fails.
Why Physical Maintenance Matters
Computers run hot. Laptops especially. Dust, pet hair, and crumbs collect in vents and around fans. When airflow drops, temperature rises. Modern processors do not always shut down when this happens. More often they throttle, which means they deliberately slow down to keep from cooking themselves. That is one of the most common explanations for a laptop that feels suddenly slow. If the fan actually fails or the vents fully clog, the computer will eventually shut down or sustain real damage. Either way, the root cause is dust, something that can be easily mentioned from time-to-time.
How to Clean a Laptop in 2026
- Power down and unplug.
- Wipe down the case with a microfiber cloth lightly dampened with 70 percent isopropyl alcohol. Do not soak the cloth. Do not spray anything directly onto the computer.
- Use compressed air in short bursts to clear dust from the vents. Hold the can upright and at an angle so the dust comes out rather than going further in. A computer-rated vacuum works too and avoids the push-in problem.
- For the keyboard, hold the laptop upside down and tap gently to dislodge debris. Compressed air helps for the keys. Skip the q-tip-and-alcohol routine on each key for modern membrane and butterfly keyboards. The risk of damage outweighs the benefit.
- Do not take the laptop apart unless you really know what you are doing. iFixit has reliable repair and cleaning guides for specific models if you want to go further.
The Screen
Microfiber cloth, dry first, then very lightly dampened with water or with 70 percent isopropyl if needed. Never paper towels. Never glass cleaner. Spray the cloth, not the screen. Cleaning weekly is fine.
Don’t Forget the Phone and Tablet
The device you carry everywhere is the dirtiest device you own. Wipe it down with a microfiber cloth and a small amount of 70 percent isopropyl alcohol once a week. Apple specifically approves alcohol wipes for iPhones now, which was not always the case. Check your manufacturer’s guidance for Android phones and tablets.
How Often
For a laptop in a clean office, two to three times a year. Add a session if you have pets, if you work from a home with kids, or if you eat at your desk. For phones and tablets, once a week. For monitors, whenever they look smudged.
The whole routine takes maybe fifteen minutes. It costs almost nothing. It prevents the kind of failure that turns a productive afternoon into a trip to the repair shop.