Hi all, I work on a DELL laptop. It sends out very heat air from its vents. I think probably there is some (or large amount of) dust on hardware devices inside it. I know that best way is to open it and clean those pieces by (say) an air compressor, but there are two points here: 1- Do you agree that this warm air is because of the dust and I need to solve this issue by cleaning the hardware snips? 2- I haven't opened any laptop ever, I somewhat scare (because that laptop is not mine). Do you still say me to do it? If so, what rules I should observe before, when and after opening the laptop? Thanks.