On Monday, 21 January 2019 22:00:26 UTC, ss wrote:

I have a couple of wall light switches that are stiff (rocker type), is
it worth or safe to spray the mechanism with say graphite lubricant or a
case of just replace them.

IME with wall switches the sliding plastic surfaces degrade, becoming rough.. You might find a little oil in the central pivot keeps it going a while, but not forever. Obviously do not put graphite in there or anywhere else. Switch contact cleaner is no use in these cases. But the simplest option is to replace the switch. Stiff switches are a small hazad, they can sit half way sparking.


NT