if its not ink, just pull it off. a hard tug and they come right out. or you can cut the plastic away from the pin and pull the pinhead through the cloth, it leaves a tiny hole though. if its ink then i dunno. that shit sucks, it gets everywhere.
You can also do it by wrapping a rubber band around the small pins side repeatedly, they work based on pressure being applied to a specific spot. A rubber band will distribute the pressure evenly and vertically and cause it to pop off.