A rule that I share with everyone who has compressed air, it is great for cleaning keyboards and the insides of PCs, laptops, nucs, etc.
The only thing I tell those to be careful of is fans/blowers. Compressed air can get the fan/blower going much, much faster than it was ever intended to spin.
So, as a precaution, use a pencil, or stick of some sort that can fit between/through the protective grill. Remember, POWER is OFF when you are doing any cleaning.
With the stick holding the fan/blower blade so it cannot spin, spray away with your compressed air. That way, the fan/blower does not spin. The same for the fan inside a power supply, the intake/exhaust fans on a case, the cpu fan, the fan on a video card, or any other fan you can find. Compressed air is good for cleaning the dust. I just do not like it spinning the fans at some outrageous speed.
Thanks that's really good advice, I've never heard that before, will defo keep that in mind. Therefore it sounds like we're encouraging a certain amount of 'unscrewing' to get to fans and the like in order to hold them in place whilst blowing the compressed air? I take it just unscrewing the 'easy' screws and getting access to the compartments that are typically exposed to doing hardware installs is far enough?
Yes, when cleaning desktops, I take mine down to the garage where I have an industrial strength compressor. I take off the side of the case, hold the fans, and watch the dust fly.
On my smaller devices, I have a reusable can that I charge up with my compressor, put the straw on the nozzle, and hit the keyboards, laptops, and any other place where there is the possibility of dust build up.
I have two cats also. Well, more correctly, my wife has two cats which are my responsibility. I have a nice filter on the bottom front of my desktop which catches most of the larger particles and hair. That I clean manually. But, when the really fine stuff builds up, down to the garage I go.
I have been doing this procedure for years, with no trouble. Also, I keep my desktop intake fan about 5"/12cm off the floor. High enough so most stuff at floor level does not get pulled in so easily.
I am sure that someone else on the forum will have their procedure to share as well.