To clean your PC hardware tools such compressed air, brushs and screwdrivers need to be used for the cleaning of the PC’s. The screw drivers are used to open the computer so that the hardware is accessable for the user to clean and this will vary depending on what type of computer you have. When cleaning the PC with the compressed air you should clean the from the top to the bottom so that all of the dust can be removed easily. Brushes can also be used to remove dust.
This is where I got the image from as don’t have compressed air. https://www.google.co.uk/search?q=cleaning+hardware+with+compressed+air&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjFlKLnqeLUAhXIYVAKHX86AyIQ_AUICigB&biw=1525&bih=674#imgrc=gfOfIihEj-a4cM: