I've had very good results with a nut picker.......have tried most of the other modes, but this works the best for me. It has a tiny little bend at the end, and when you remove the top and o ring, they usually come out together.....I hold the o ring and top on the edge of the picker while filling my cart without even putting them down on my work space.
I've become very proficient at this, and my friend who is new to
vaping commented that I was too fast, and to slow down so she can learn to do it right.
Gracie