Squeaking and creaking HP 28C

[Pjwum]

(08-25-2018 01:18 PM)Maximilian Hohmann Wrote:  I don't know... I rather let mine squeak

:-) To each his own.
The amount of lube penetrating into the hinges is so tiny, it hardly will make its way to any of the electronics. In addition to that wax based lube is an insulator and the cable connector between the two pcbs is isolated.