My computer needs relieving of several months build up of internal dust.
I have 2 questions:-
1] I've bought an air-duster can from a computer supplies shop. However I notice that as well as 'clean' blasts of air, the can also occasionally expels an icy cold substance which leaves an initial white residue wherever it settles [which slowly fades]. This usually happens when the can is tilted so I try to keep it straight, but it is very difficult to avoid tilting just a bit while working.
What is this substance - can it be harmful to my computer parts, such as the exposed circuit boards [which are dusty and need attention]?
I'm assuming it's something to do with the gas that powers the air-duster, and I have noticed this with every can I have used over the years so this is not just a faulty one - but is this substance safe to land on my computer components?
2] Rather than using an air-duster to 'blow around' the dust, I would much rather 'suck it out' completely - i.e. using a vaccuum cleaner. However I was warned a while ago that this might be dangerous to my computer [for reasons to do with electricity or static, I can't really remember].
This is the setup: my computer is fully disconnected and open on a table, I plug in and switch on my vaccuum cleaner and carefully point the plastic
sucking nozzle towards the various computer innards. I do not
touch any innards, carefully staying a few inches away from all the components as I work.
The vaccuum is quite powerful and does a much more thorough job at removing dust... but is what I have described safe?
Thank you for any help on this, I think I'll wait for answers before I proceed!