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Canned air or compressed air is great for cleaning out lint, fuzz, bugs, mouse leavings, thread, and general dirt - - on non electronic machines only. Machines like the clones are open and there really isn't any place you can blow the debris into. Machines with removable tops are easier to clean with compressed air too.
The only thing I don't like about canned air like you buy in the stores is if you tilt the can you can get a blast of moisture that will wet down the metal. At least that's my take on it.
Besides ............. canned air noise causes the cats to vacate the area
LOL
Joe