So this is about the compressed air cans, rather than some kind of electromechanical tools that generate air (that you can use to blow the dust away)?
I use compressed air cans whenever I open up a PC (laptop) for cleaning. They are especially important for laptops as there are lots of hard to reach places inside with dust, unless you really open it up completely, up to removing also the motherboard from the laptop.
I don't understand why so many laptops are designed so that the fan(s) are quite hard to reach, as those are usually the first things you want to clean, and sometimes also replace if they're broken. Why can't you simply open some hatch under the laptop in order to completely reach them (even removing them), but generally you have to take out the whole laptop keyboard and top parts of it, AND in some laptops on top of that you also have to remove the whole damn motherboard before you can completely see the fans?!? Is this intentional so that it is harder for people to clean and replace the fans themselves? ASUS G75VW has sort of "fan hatches" where you can see the rotating part of the fans, but in order to e.g. remove the fan, you have to go through the other way, remove the keyboard.
Back to topic: I am just amazed how much a can of compressed air costs. It is just air, right? I easily use up even half of a can if I completely clean a laptop. Such can can cost like 6 euros. 6 euros of air? No wonder I am enticed by the idea of blowing with my mouth instead, even if I know my saliva is poison to electronics.
Hence, I've been looking for any kind of device which would produce a similar concentrated air blast, without having to keep buying air cans all the time. Are there such tools? I mean, a bit like a reverse vacuum cleaner, miniature model, meant for cleaning electronics? Or are the compressed air cans really the only option?
Also, sometimes it DOES seem to me as if those air cans spit some kind of liquid out, something that evaporates to the air within seconds. What is that "liquid", and is it also harmful if it ends up on the electronics? It may come out if e.g. the can is not straight up.
KingofGnG: Some years ago I was tired of purchasing compressed air sprays, so I purchased a "small" (lt.24) proper compressor which is now in a corner of my computer/library/TV room. When I need to clean something (computers, mechanical keyboard etc.) I just recharge the thing for a couple of minutes and then I BLOW EVERYTHING (outside, on the balcony).
Except for the hellish noise the compressor makes when recharging, I found it to be the best and definitive solution to my computer cleaning needs.
THIS! So do you have links to such devices, how much they cost etc.? Are they meant for cleaning electronics, or what?
I mean, aren't there even some plastic toys that can produce some sort of air blast? I'd much rather use some tool, than keep buying air cans for 6€ a pop.