Get Ready: It’s That Semi-Annual Clean Your Computer Time Again

Spring cleaningHere in North America, tonight is the night we adjust our clocks back one hour, reverting to Standard Time. To make it easy to remember, I schedule my computer maintenance and cleaning, at the Spring and Fall time changes – just as I schedule my smoke detector battery replacement. So, today is the day I get out my cleaning supplies, and do a top to bottom physical cleanup of my machines.

Over the years I’ve noticed that many computer users are not too concerned with keeping the physical components clean; and they need to be concerned.  Computer maintenance involves not only keeping a computer clean of malware; viruses, Trojans, spyware, and adware – but, keeping the physical machine clean as well.

As regular reader TeX pointed out last year, when I ran this article – “Think of a place that hides more dust than the space under your bed.” He’s right – a computer system can collect an an amazing amount of dust.


No, this is not one of my machines. Winking smile

Physically cleaning your computer is potentially one of the most important cleanup jobs you’re ever likely to do. Here’s why – heat.

Heat is a component killer, and it’s the chief cause of CPU failure in computers. CPU failure, caused by dust clogged vents, which leads to reduced air flow, is a more common occurrence than many realize.

Killer Dirt = Killer Heat

Overheating of the CPU will, at a minimum, cause the system to behave erratically; the computer spontaneously switches off, or restarts; frequent “blue-screen” error messages, and more.

Keeping your computer in top shape, with a regularly scheduled cleaning program, will prevent the inconvenience of having your system go down, and in the long run save you money.

Tools you’ll need:


A can of compressed air

Cotton swabs

Rubbing alcohol (70% is fine)

Paper towels or anti-static cloths


Make sure you disconnect the machine from the wall outlet before you begin maintenance and cleanup, and be gentle when touching the components inside the case.

Open the case:

If required, use the screwdriver to remove the side of the case that’s opposite the motherboard. Blow compresses air over the components and interior of the case, keeping the can upright and nozzle four inches away from components.

Clean the power supply and the case fan with a shot of compressed air. Next, blow compressed air into the CD/DVD drive. Give the inside of the case a wipe with a slightly moistened cloth before replacing the cover.

Clean the exterior:

Wipe the exterior of the case with a slightly moistened cloth; repeat the wipe with a dry cloth or paper towel. Be sure to clean all case openings using this method.

Clean the keyboard:

Since the keyboard gets more physical contact than any other component, if you can, clean it on a monthly basis. Blowout in and around the keys with compressed air monthly and on your scheduled cleanup rub down the keys and case with a clean cloth slightly dampened with rubbing alcohol.

Clean the mouse:

Like the keyboard, the mouse gets substantial physical contact and requires cleaning on a monthly basis. If you have an optical mouse simply wipe it down just as you wiped down the keyboard. If you have a mechanical mouse then you need to remove, wash, and then dry the ball.

Next, clean inside the mouse with a cotton swab moistened with rubbing alcohol. Finally blow compressed air into the opening and then reassemble the mouse.

Clean the monitor:

Never spray liquid directly onto the screen. Instead, moisten the cloth, or the paper towel, with the cleaning solution. Spraying the screen directly runs the risk of liquid penetrating into the monitor components.

Wipe the screen gently to remove dust and fingerprints. For laptop screens, buy a special cleaning solution available at computer stores. Do this weekly.

I know this is a no-brainer, but before you plug the computer back into the wall outlet, be sure all components are thoroughly dry.

Previous postings of this article drew some very valuable comments from regular readers, including the following:


I always clean my PC one a month. In a tropical country like here, dust is everywhere. Clean, turn around, and there’s a dust again. PC cleaning inside and out is must here, because of very hot temperatures.

Georg L:

Cleaning is nice, but when doing so, one should also change the heat sink compound between hot semiconductors and the respective heat sinks. The CPU is most critical in this respect.

Volatile components evaporate over time, turning the compound into an effective heat insulator with a plaster-like texture. I suggest a change every second year in moderate climates, and an annual change in the tropics.

Just to follow up on Georg’s comment – earlier this year, a reader explained that he had rebuilt his machine and replaced all components (other than the CPU), and yet, the machine still locked up after just a few minutes of operation. I passed on Georg’s advice and voila – problem solved!

If you have the time, and you want to give your computer system a total clean up, you should consider reading “Maintain Your Machine – 10 + 1 Free Computer System Tools”, on this site.

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Filed under Cleaning Your Computer, Computer Maintenance, Computer Tune Up Utilities, Freeware, Save Your CPU, Software, System Utilities, Windows Tips and Tools

10 responses to “Get Ready: It’s That Semi-Annual Clean Your Computer Time Again

  1. I got to this blog somehow and don’t know how, but ever since I have subscribed, my computer works better. Thanks. I do what I can as you advise and I love how all my stuff is free, too. I am fighting a bug in my own body, but seems like something to do. I will be cleaning my ‘puter as well. Thanks for the guidance!

  2. Mal

    Hey Bill,

    Earlier this year, my computer started beeping at me. It was an alarm to say “I’m overheating”. I took off the cover and cleaned out all the dust, which was everywhere. When I turned it back on, the temp at dropped 30 deg Celcius. No wonder the machine was screaming at me. So a good timely article on your part.


    • Hey Mal,

      Over the years, I’ve seen more than a few CPUs bite the dust (no pun intended), due to overheating, when a simply cleanup would have cured the problem.

      Good to hear you’ve got a well trained machine that will tell you – hey, I’m HOT. Now, if I could only program that function into a few people I know…. 🙂



  3. Bob Bloggs

    Just two comments. Watch the rubbing alcohol, a lot of it contains baby oil. Not good on some plastic. Second I prefer to use a vacuum to get most of the dirt out before using the caned air


  4. Georg L

    Hi Bill,

    Bob’s advice to use a vacuum must be taken with a grain of salt, because vacuum cleaners are known to produce a helluva lot of static charge, which some semiconductors might not survive.

    To keep computers clean, it is a good idea to put them on a pedestal or the like, so that the blower would not ingest too much dust, which tends to collect on the floor.

    All the best


  5. bokawel

    great advice bill.

    i have always recommended users to clean their PCs once or twice a year. a 100% pure bristle paint brush and a vacuum to top of it is great to avoid those static problems. make sure you don’t use a synthentic brush.