Dexcom G6: Cannot Remove Casing from Transmitter

Thank you for your suggestion. My daughter-in-law plays guitar and gave me a 0.5mm pick. Sorry to say but it did not work for me. Kept slipping only because my hands simply do not have the strength to hold items firmly.

MM1, I tried the fork which kept slipping. My husband died this past Oct. and left a lot of hand tools. so I rummaged through and found a pair of very small nose pliers. I could not hold them firmly and wound up chewing the small lip in a number of places. So I returned to digging the transmitter out of the casing by inserting a sharp paring along each side and digging the transmitter out. that seems to be the best bet for me and my weak hands.
Thank you for your suggestions.