I'll could try a drop of oil but I don't want any migrating underneath the translucent natural G-10 scales and leaving a visible blotch. Meantime, I'll keep flicking away
If oil gets under the G10, just wash the knife in hot, soapy water.
In fact, if I had a "sticky" lock, it's the first thing I do. Who knows what gunk is in their making the lock stick, maybe a bath would fix it?