Never squirt or spray any liquid on a computer component. Spray the liquid onto a cloth if a spray is required.
A vacuum can be used to pick up debris, dust, or hair from around the computer.
Before cleaning a component or the computer, switch it off.
When cleaning, take care not to alter any knobs or controls by accident.
Also, if anything is attached to the rear of the computer, make sure not to unhook the connectors.
Hold the fan or insert anything in between the fan blades to keep it from spinning when cleaning fans, especially smaller fans.