I use a dental pic but a long sewing needle works also. Just be sure to get behind the ring without poking a hole into it. For driptip I squeeze the ring and put the pic behind where it begins to loop out, the same could work for the other orings.
Drip tip orings loose their ability to snap into the atty so remove the oring from the tip put them into tap hot water with a couple drops of dish soap, good mix, rinse and let them dry and they snap into the atty again. Wash the drip tips also since your at the sink to begin with.