Did the tips break off because of rust ? If so I would spray a little PB Blaster on the snapring/circlip . I would also take a small punch and lightly tap all the way around the clip to help loosen it up in the groove . then proceed with the dental pick or whichever means you try and work the ends out . If you can have a second person to help , try and have a thin flat blade screwdriver ready to get behind the ring as soon as your able to get the end to lift out of the groove.