[header] How to clean a headphone jack [title] Buy a can of compressed air. [step] These cans can often be found at electronics stores like radioshack or best buy. Compressed air is also used for clearing debris from computer parts, so look where computer parts are sold. 
Air is least likely to damage your jack since you don't have to put anything inside the hole other than the air. [title] Point the nozzle at the headphone jack.