Cyclone AFC cap - how do you remove the cap?

[benjamind2013]

It's so tight I can't remove it, and if I try I bent my fingernail trying to get it out. Still won't budge. Help. Please!

 

[Sthur]

Try one of those rubber jar opener things. You might use a battery you done care about to connection and the rubber thing to grab the top.

Good luck with the cyclone.