HP45 power switch lubrication without opening calculator?

[Dave Frederickson]

(10-05-2020 09:29 PM)ijabbott Wrote:  Would pressing down on the switch and blasting it with a squirt of canned "air" do any good? I was thinking it might dislodge some of the dust clogging the switch mechanism.

Probably not. It's likely that the old grease has hardened and needs to be cleaned away with some solvent. Then a little Lubriplate ES-DS will have it switching like new.