My students always have trouble removing the little blue connectors. I created a not very durable pencil top remover if you’d like to try it. It works pretty well just don’t twist it, lever the connector out.
3D printed connector remover
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Very interesting this element for the removal of the pins this can be very useful in our activities.
It would be nice to leave a link available so that other users can download the .stl file for printing!
Greetings from 
I’m not an IQ person, but you could probably post it on Thingiverse and then put the link here.
I added a link to Thingiverse.
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