I find that compressed gases just don’t work for me on computer accessories (e.g., keyboards and cases) or cameras — the junk just gets blown deeper inside or I am afraid that the “condensate” will gum things up. A vacuum seems a better solution, but the teeny-tiny ones sold for these purposes don’t suck enough(!). The answer — an $8 Vacuum Micro Attachment Kit. This is an ingenious set of attachments and connectors that turns any upright or canister vacuum into a powerful “micro vacuum” that really does the trick on keyboards, PC cases, cameras (bodies and lenses) in a safe and effective manner.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.