Have an old (HP Omnibook from 1993+) keyboard that feels too sluggish. It takes a little bit too much effort to press the buttons. There is no difference between individual buttons. This particular machine was like this when I got it, but I have used other ones that had better keyboards.
(It feels like there is some additional resistance beyond the rubber springs, so the springs themselves are probably fine.)
Am wondering if it would be a good idea to add some lubrication (silicone), or if that would degrade the rubber (or cause some other problem)? Any other advice?
Also, are those rubber springs generally available for purchase?