>I have a can of compressed air which I use to clean out the fans sometimes when things are running hot. its amazing how much crap can end up in there.
>
>Tip is to stick something down through the fan so it doesn't get spun by the compressed air which can damage it.

The technical person there put a lighter on the back just so we could see if some air was coming out. Interesting idea in the same way as a slow burner stove such as we have in houses, where we need to check if everything's clean out there.