Your perfect weapon against dust and dirt inside your pc or anywhere else. And the can contains 400 ML so there is enough for some really, really thorough cleaning.
Dust and dirt inside your PC case and in PC components will prevent good cooling and can cause instability or malfunction.
Dust will gather on fan blades and components this can cause instability of the parts which can result in noise and resonance.
Keep coolers, fans and all other components dust free to preserve silence and stability.
Hold can upright when spraying, do not tilt can more then 40degrees during spraying operation. Use in short bursts - do not shake can.