I have a circa 1920 push-button light switch which sticks occasionally. The push buttons move fine, but sometimes the blade switch inside doesn't flip unless the button is pressed very hard. I'd hate to replace this, because this antique switch has a more solid feel than replicas I've used. Is there a safe lubricant for mains power the switches?
And yes, I plan to remove the paint. :)
Edit: I would take it apart to clean, but the screws have been sealed by some kind of resin.