She's holding that Jailbird hostage, that's why the mic arm is squeaking. But to answer her question, she should use machine oil like Singer, it's meant for use on metal to metal contact.
Other Chatters: Forgive me. Chad: I don't want forgiveness, I want some loving corrections! Nerissa: Go to the sin room, I'll get the whip ready. Other Chatters: WAIT, THAT WAS AN OPTION?
I saw a lot of people saying WD40 in chat to lube her mic arm, so i'll state here that WD40 is not a lubricant and it will actually wash away lubricants.