mac: add vacuum note

articles/cleaning-macbook-after-16800-hours-of-use/README.md

@@ -18,3 +18,5 @@ Once I open the back panel, you can see that batteries are badly swollen. Even i
 As you can see, both the fan blades and the heat pipe grills are clogged with 7 years' worth of dust! No wonder why the machine was overheating all the time.
 
 After a throughout vacuuming, I let the CPU to run at max load for about 5 minutes. After 5 minutes, I could hear the higher-pitched airflow sound. Before cleaning, there was no airflow noise and only a low-pitched noise from the fans themselves. When I put my hand behind the monitor, I can feel the hot air flowing again. This didn't happen in years! Anyway, this is the final moments of this machine. I will leave it up for recycling. Or maybe someone will be willing to fix it and use it. We'll see.
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+Note on using the vacuum cleaner on electronics: The dust particles travelling inside the vacuum hose will build up some static. This can create some static discharge onto the electronic components. In my experience, this can only happen if you are cleaning a very very dusty desktop computer. If you have an air compressor available, it is a better option.