Question on oxidation of brass inserts in shafts

Bluejuice

Registered
So I have this Jacoby ultra pro in 5/16x18 using a brass insert. Been using it over a year with no issues. The pool hall in my area just opened today after 3 months, and when I took out my cue from the locker, a blueish green powdery substance could be seen in the thread of the male joint protector, which I believe is the brass oxidizing.

So my question is, is this bad?
Did 3 months of inactivity cause it to oxidize? Could it possibly have something to do with the manufacturing, or was it my own neglect. And if it's bad, how can I fix it?

Thanks in advance for any help you guys could give me.
 
Brass can tarnish if it's in high humidity climate. Use some metal polish on a Q-tip. Make sure you wipe off all rest of polish and gunk when your done.
 
Thanks for the help, so I'm guessing for humid areas, a shaft with wood or phenolic threads would be more ideal?
 
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