Me too, i worked it a few hundred times hoping it would ease up some but no dice.
A dab of a good gun grease where the detent and ball bearing work and under the parts that slide should make it better. If not, and if it was mine, I'd pop the "C" clip, remove the safety lever and polish whatever rubbed against whatever, lube and reassemble. I've never had to do that, but don't think it would be that hard. I'd leave the inside stuff alone.
DF
