HP45 power switch lubrication without opening calculator?

[rprosperi]

DeOxit (Red) is an excellent cleaner, and good to use to ensure your contacts are clean, but not a long-term lubricant.

Use a lubricant made for electronics, such as Lubriplate (found on eBay, Amazon, etc.) and yes you can simply (carefully of course) put a small amount into the power switch slot and work it in by simply sliding the switch back and forth (but remove power when you do this, there's no reason to stress electronics with 50 on/off cycles).

It could be a bit messy, as it's more of an ointment than a liquid, so be sure to clean up the surrounding face and also the exposed area inside the switch slot, to prevent accumulation of dust into the greased area.